This is now the new trend, every exchange wants to do ieo no matter how shitty the project is. If you are investing in any ieo, consider it a big risk. If it pays off, fine. If it doesn't, we learn.
Every investments have risk. And larger the risk you want to accept, larger could be the potential profit.
As of IEO, binance's success with it's launchpad made every exchange to include similar schemes. Definitely binance was not the first to introduce it. Before binance took the strategy to study and list promising project as IEO, IEO was not as popular. So, it's binance research and their selection that increased interest in IEOs. Not every Exchanges are same as are IEO. So, we should consider both the issuing exchange and the project itself before deciding to jump into an IEO.