Before the EIP that was introduced with the HF
We had 75/25, curators would earn 25% from the posts but it was never fully 25% as voting early, which many did to front-run other curators, returned funds to the pool.
OCDB would take e.g. a 10 steem bid, give back a guaranteed upvote of 10% ROI, meaning the 75% that would go towards the author was calculated to return 11 Steem after payout was due and 100% of the bid would go out to everyone delegating Steem to OCDB pr…