in case of failure, are the funds returned to investors?
Yes. I have checked that one myself. It's hardwired in their smartcontract, as it should be actually. Check their github dude.
But I think that's only the case for funds raised in the normal tge? Private placement and pre TGE funds usually don't get replaced.
Couldn't find anything about that with a quick look. Better check that to be sure.
In case of failure, all funds will be returned.
Pre-TGE is considered successful if at least 1,575 ETH have been collected.
TGE is considered successful if at least 7,000 ETH have been collected.
Otherwise, all funds collected will be returned to the participants.