DJ Khaled and Mayweather had an issue about shilling an ICO. And other celebrities hyping or promoting scam coins. Who would actually rely on their words? If you're listening to celebs then you are not ready for this type of market at all.
Tbh it's a good way to promote the ICO, i'm sure many people will look what is that and even invest on that ICO only because of that celebs promoting that. In my opinion it's still same, you must be careful and don't invest your money blindly on ICO even promoted by celebs.