I think it is a bit more legit if an IEO is launch on bigger exchanges. Because they know that it can be very hard to enter big exchanges and convince them that your project is very useful and insight of having a very solid future to get funds using them. What's you opinion on this? Do you think there are other reasons if they choose other small exchange platforms?
They already have a mileage compare to other projects who does independent crowdfunding like ICO, because Binance has strict compliance and of course Binance do not want to lose the trust of their investors and traders if they are going to accept a low quality project.
But after the crowdfunding or launching it's out of the exchange's control you also need to do your research and always follow the development of the project, this is not 2016 or 2017, where you can just buy a coin and forget it and wait for it to get their best price.