{"window_days":7,"from":"2026-09-14","games_returned":7,"games_withheld_below_min_bets":24,"min_bets":100,"method":{"estimator":"mean payout multiplier, currency independent","interval":"95%, mean plus or minus 1.96 standard errors","source":"each casino's own public bet feed, captured by us","sampling":"the feeds are rolling windows the operators publish; this is a sample of their flow, not the whole of it, and the selection rule is not visible to us","declared_rtp":"only Stake.com publishes a house edge, so declared_rtp and gap are null for other operators","selection_bias":"the feeds are the operators' own marketing surfaces and the selection leans toward winning rounds, so observed_return is UNCORRECTED and biased upward by an unknown amount that differs per operator. feed_bias reports 'curated' where an observed return above 100% proves the feed is incomplete, since no game returns more than it takes over the long run."},"confidence_levels":{"high":">=10000 bets","moderate":">=1000","low":">=100","insufficient":"<100"},"publishable":["low","moderate","high"],"source_kinds":{"observed":"Counted directly from the operator's public feed.","derived":"Computed from observed data through a documented method.","reported":"Published by the operator. 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Read it as a floor on the operator's curation, not as the game's return.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"Shuffle","game":"Keno","provider":"unknown","bets":81134,"observed_return":1.0384705548845121,"declared_rtp":null,"gap":null,"std_error":0.027348219550975196,"ci95":[0.9848680445646008,1.0920730652044235],"max_multiplier":800,"confidence":"high","margin":0.05360251031991138,"publishable":false,"withheld":"implausible","diverges_from_declared":null,"window":{"from":"2026-09-14","to":"2026-09-21"},"published_loss_share":0.7885596667241846,"feed_bias":"unknown","observed_return_note":"Uncorrected for feed selection. The operator chooses which rounds to publish.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"Cloudbet","game":"Keno","provider":"cloudbet","bets":69465,"observed_return":0.973100707896701,"declared_rtp":null,"gap":null,"std_error":0.03334796006579084,"ci95":[0.907738706167751,1.0384627096256511],"max_multiplier":800.0000000000001,"confidence":"high","margin":0.06536200172895004,"publishable":true,"withheld":null,"diverges_from_declared":null,"window":{"from":"2026-09-14","to":"2026-09-21"},"published_loss_share":0.836781112790614,"feed_bias":"unknown","observed_return_note":"Uncorrected for feed selection. The operator chooses which rounds to publish.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"BC.Game","game":"Keno","provider":"bc originals","bets":3366,"observed_return":1.0170423254344518,"declared_rtp":null,"gap":null,"std_error":0.11886883497874648,"ci95":[0.7840594088761087,1.2500252419927949],"max_multiplier":346.46459999999996,"confidence":"moderate","margin":0.2329829165583431,"publishable":false,"withheld":"imprecise","diverges_from_declared":null,"window":{"from":"2026-09-14","to":"2026-09-21"},"published_loss_share":0.7724301841948901,"feed_bias":"unknown","observed_return_note":"Uncorrected for feed selection. The operator chooses which rounds to publish.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"Stake.com","game":"keno","provider":"stake","bets":2082,"observed_return":5.757084534101825,"declared_rtp":null,"gap":null,"std_error":0.6193609987993193,"ci95":[4.543136976455159,6.971032091748491],"max_multiplier":500,"confidence":"moderate","margin":1.2139475576466658,"publishable":false,"withheld":"imprecise","diverges_from_declared":null,"window":{"from":"2026-09-14","to":"2026-09-14"},"published_loss_share":0.5816522574447647,"feed_bias":"curated","observed_return_note":"This feed publishes more wins than it publishes losses, proven by an observed return above 100%. Read it as a floor on the operator's curation, not as the game's return.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"Cloudbet","game":"Keno","provider":"spribe","bets":1530,"observed_return":0.9549673202614378,"declared_rtp":null,"gap":null,"std_error":0.04493570883277184,"ci95":[0.8668933309492051,1.0430413095736706],"max_multiplier":25,"confidence":"moderate","margin":0.08807398931223281,"publishable":true,"withheld":null,"diverges_from_declared":null,"window":{"from":"2026-09-17","to":"2026-09-19"},"published_loss_share":0.5784313725490197,"feed_bias":"unknown","observed_return_note":"Uncorrected for feed selection. The operator chooses which rounds to publish.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}},{"casino":"Roobet","game":"Lucky Stars Keno","provider":"hub88","bets":119,"observed_return":0.680672268907563,"declared_rtp":null,"gap":null,"std_error":0.1836986219025559,"ci95":[0.3206229699785535,1.0407215678365727],"max_multiplier":16,"confidence":"low","margin":0.36004929892900955,"publishable":false,"withheld":"imprecise","diverges_from_declared":null,"window":{"from":"2026-09-15","to":"2026-09-21"},"published_loss_share":0.7815126050420168,"feed_bias":"unknown","observed_return_note":"Uncorrected for feed selection. The operator chooses which rounds to publish.","source":{"bets":"observed","observed_return":"derived","declared_rtp":null,"gap":null}}]}