How do you react when you come across a project saying that it is not charging any fee, e.g. a swap or a DEX which does not collect any fees. Do you take it as an advantage or it does not look serious enough to you?
First thing to do normally is to ask why they are not charging any fee. I'm pretty sure they have a support system in place for curious people like you and me. Ask more if you are still in doubt if they can actually sustain a fee-less platform. If you can't immediately get a response from support, then there's the website to read more about their business (whitepaper for example).