my mother and i, we are legit users, we follow the supreme two rules: dont create multiple accounts and dont use bots.

It is not at all suspicious but reducing the base reward is necessary to keep the site profitable and the faucet available for all. The faucet is funded by the house edge of the Hi-Lo game and those that buy lottery tickets so it is fair that they continue to receive higher rewards. If you don't want to gamble then you can also deposit and keep a larger balance and you will also get higher rewards and receive interest payments as well.

i not doubting about botnets, sure they are out there, but what im saying, this solution right now, at the state it is, is not working, its creating colateral damage (soon your stats will tell).
take it back to the drawing board, test it extensively before re-implementing, in the mean time, use multiple captchas type...