They are obviously IOU's (google if you dont know what it is)

Why would yobit risk their reputation (and therefore their whole revenue = profits) by not paying out?

It worked fine with all the previous IOU's that could be bought on yobit, dont understand why suddenly it should be different.

If the waves team likes it or not.. well that is a completely different question.

But yobit is free to do their own thing and as long as they dont scam anybody.. who cares right?