What is unfortunate of them is that they are not optimally involved in registering their projects in exchange which can actually have a greater positive effect on their tokens or coins. They prefer to register for cheap, even free, bad exchanges and the team no longer cares about community complaints because they feel they have kept their promises to be registered on the exchange.
The various reasons can be the main factors why those small coins can't listing their coin to the big exchange site. Just like this:
lack of the liquidity, lack of the development progress, no result after the development progress and many more. not all of the projects are having all of the requirements to register their coin in a good exchange site.
So many projects that are still undervalued but volume becomes the main problem as the traders are doing hit and run for profit.
When a project can keep its development and that will be dead.