OK I understand now.
If I understand correctly, you would like to give periodic rewards to users for “staking” their coins on your site. There is no such functionality at the moment, however I do intend to implement this request to the Airdrop Extension, which will accomplish exactly that.
Generally I do not undertake custom development, this is mentioned in the FAQ. However this is something that I do plan to implement. When it is out, I will notify you on this thread.
Please let me know if I misunderstood what you are suggesting.
with regards