{"window_days":7,"from":"2026-08-07","games_returned":1,"games_withheld_below_min_bets":0,"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. We repeat it, we do not verify it.","estimate":"Model output carrying assumptions. Always a range."},"games":[{"casino":"Shuffle","game":"Blackjack Free Bet Francais","provider":"unknown","bets":209,"observed_return":1.0403341243125046,"declared_rtp":null,"gap":null,"std_error":0.0646024828638043,"ci95":[0.9137132578994482,1.166954990725561],"max_multiplier":5,"confidence":"low","margin":0.12662086641305642,"publishable":false,"withheld":"imprecise","diverges_from_declared":null,"window":{"from":"2026-08-07","to":"2026-08-14"},"published_loss_share":0.5311004784688995,"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}}]}