I don't think it will since they're having an ICO , but I'm guessing it runs on the Decent platform and that's extremely beneficial. Since it's an idea that seems to be a sort of no brainer, with a great team with Matej Michalko as a co-founder, 100+ million users, and so on, it will raise a lot of money, it will be very beneficial for them to only accept DCTs. It would put the Decent brand in the spotlight, in the awareness of many times more people that currently know about it.
Personally I think there should also be a hard cap, unlike ATMChain, which raised 230 million dollars. Even though such an ICO with no hard cap, only accepting DCT would be unbelivable for Decent.
I couldn't agree more with ja23. If they don't wanna make it mandatory to use DCT for ICO, then they should give bonuses instead just like SophiaTX did.