I am investing in IEOs especially running in Binance, because it is the most trustworthy exchange, and usually it lists only the high-quality projects on its launchpad. But if the project is convincing me, and looking solid with high potential, I can invest regardless of the exchange which runs its IEO.
Sometimes projects that are released on the main exchange do not guarantee long-term profits, we can see that now because prices are declining, but they have real products that may increase at any time.