If I unlock this bonus

it will stay forever or when I use it it will reset and I need to unlock it everytime?
The wagering requirements are an ongoing ratio against your total free winnings. The balance part of the equation is capped so as not to punish old accounts that have a high free winnings total because they started when Bitcoin price was much lower.
I'll be reading the comments for 2 days, not I will answer, simply if I see that you demand it,
If you are looking for low life thieves that steal from faucets this is probably the wrong place to do it.