Guild giveaways/ prizes for events like poe trivia nights against TOS?

My guild has been brainstorming ideas on how to make more internal events, and one point of contention has been popping up is the TOS in regards to giving away items. I have seen multiple forum posts and angry reddit posts for getting banned for giveaways etc; however I'd like a bit of clarification on this. I truly don't want to get our accounts in trouble however it would be nice to have competitions and raffle like giveaways (not for real world things) to help with engagement.

I don't see an issue with in game items, but I believe that giving MTX is a no no unless you get explicit permission from GGG.
I know Zizaran talked about this a while back about gifting stuff to his viewers. There's a fine line to where they have to make sure that those people aren't paying the person real money for in game gifts like subs or donations because it's almost impossible to prove.

Your best bet is to contact support directly to get an official answer.