several stupid question i cannot find answers for :)

don't open a thread called blacklist.(it will get you blacklisted)
you mean wishlisted games not whitelisted ?
you should not care about blacklists.
have you thanked any GA creators for winning their GAs.
check this out

Should You care?
No

ok
what about accidental "multiple wins" that hang on me?

what about "white listed games" list?

do you mean with whitelisted games this?
http://www.sgtools.info/whitelisted

if i´m right, sgtools cant check these games properly so if you won the game, it dont checks if you activated it or not. so sgtools will show you no wrong "not activated"
the multiple wins will never disappear unless you solve the problem: ask the old giveaway creator for the multiple copies for a reroll.