Being listed on a exchange as an coin isn't all about the money. Exchanges also look at the reputation of the project. Because if they don't and the coin turns out to be a scam then that exchange that listed it will face the consequence. So if you look at Binance the coins there is quality. Because you need money and trust to get listed.
This is one of the few reasons why I trust binance, they are very careful before taking up a project to list on their exchange platform, it's not always about the money, it's more about the quality of projects
They prioritize the quality of the projects. If the projects are of good quality and have products, they will list them in exchange.If they do not have enough money to pay for binance then I believe that Binance will open a contest of votes among projects.