P2pb2b is a well-known russian scam exchange. They can run away with all the money any time.
Moreover the IEO returns of the exchange won't be impressive. You will be lucky if you could get some part of the fee you paid them.
It's sad to see projects still choose such kind of exchanges, not listening to any warnings and not consulting with experienced agencies.
They still go for that exchange because the listing is cheap and might have been deceived by the fake volume that this exchange is offering. Anyway, in time, we will know if this platform can withstand the competition in this market. By the way, they are not the 1st freelance platform here as they claimed to be. There are bunch of projects that have been launched way way earlier than them.
I do not think that holding an IEO on an exchange of this level a priori can be cheap. Usually such exchanges charge from 4 BTC per listing, so not every project can afford it.