https://www.draftkings.com/refer-a-friend/terms
Quote:
Minimum referral requirement: You must acquire a minimum of two (2) new Invited Friends within any thirty (30) day period in order to qualify for the commission structure above (the "Threshold"). Failure to meet the Threshold shall result in a reduction of the commission rate on Net Referral Revenue from all Invited Friends. The commission rate will be permanently reduced to a flat twenty-percent (20%) in any period in which the Threshold is not met. Furthermore, if you fail to acquire a minimum of four (4) new Invited Friends over a six (6) month period, we reserve the right to terminate your active Invited Friends without notice.
Nice surprise to to find out today.