1.if somebody claimed 30,000 satoshi from faucet, then it cannot be withdrawn?
1) Yes.
So, if I will only claim from faucet without wagering or buying lottery tickets and try to withdraw my earnings, will it be called as abuse and I will risk to get my account blocked?
Lol, My bad, I read that as "can" not "cannot" in the question. I'll go back and edit my answer.
It's fine just to claim the faucet and withdraw. It's multi-accounting to play more than one free-roll per hour and self-referring that are abuse.
I will add one more question. Claimed only from faucet and wagered it but wagered amount is still higher than claimed amount but wagering is never done by direct deposit , and amount still remain withdraw able after wagering, will it still be abuse?
(Provided, there is no referral and multi account abuse.)
I guess, you need to put some TOS in your site.
None of that matters. You don't need a ToS to tell you what faucet abuse is.