I have nearly signed up but changed my mind after reading their T&C.
3.9. If the Affiliate has not attracted 3 (three) New users for 3 (three) months in a row, the Company has the right (but is not obliged) to change the terms of cooperation, including lowering the amount of the commission received by the Affiliate or suspend the Affiliate Account in Affiliate Program. In some cases, the termination of the current Agreement with the Affiliate is possible.
4.4. The Affiliate Program reserves the right to block the Affiliate Account for public defamation, unjustified criticism, insults, and threats towards the support service representative or administration of the Affiliate Program and/or Affiliate Program projects;
9.2 If the Affiliate does not have such an amount on the Affiliate’s account, the funds will be automatically transferred to the next period, and so on until the required amount is accumulated. The negative balance is also transferred to the next month;