154k wagered (used referral code), total bonus/rakeback = 873$ – money back per 1$ ratio = 0.0056
(I did not take advantage of a customized referral link – with an affiliate link I would estimate the ratio would be closer to 0.70)
Chips:
57k wagered (used referral code), total bonus/rakeback = 258$ – money back per 1$ ratio = 0.0045
Gamdom:
90k wagerered (used referral code), total bonus/rakeback = 341$ – Money back per 1$ ratio = 0.0037
Roobet
110k wagered (used referral code), total bonus/rakeback = 297$ – Money back per 1$ ratio = 0.0027
Bitstarz:
205k wagered (used referral code), total bonus/rakeback = 553$ – money back per 1$ ratio = 0.0026