Many coins have been successful in sales, but are not included in the Exchange. We knew they were doing it because they wanted to keep prices stable and there was no decline. This condition occurs because the market is still very low. We must be patient and continue to consider before deciding to join a new ICO project.
They don't put their coins in the exchange to avoid bounty hunters dump their coins. As we all know, lots of hunters immediately dump their coins if it has been listed on the exchanges. And once the bull run starts, probably you'll see your low value coins in the exchanges, you'll be surprised that its value is higher than what you expect.