Many other projects are a lot better, and if you missed one, I think you should keep looking for other projects. Choose the IEO projects at the big exchanges like Binance, Okex, Huobi, Gate .. Surely those projects will bring you profit.
the quality of the exchange does not guarantee a profit. now the hype around IEO has already passed and now all investors have become smarter and do not invest in every project that conducts IEO on one of these exchanges
The quality is purely depends on investors are project OP. I think large scale exchanges are expecting some large investment on the project so before to choose they can verify it is worth or poor in the Blockchain. Normally most of the active traders and investors are available in Top exchanges, At the same time private sell is hide on most of the project so we must read carefully and pic the worth project is always make successful.