Those big centralized exchanges like Binance will list a project only after it became big enough...
We know about a lot of such projects that have not been traded anywhere before and, accordingly, TGE occurred directly on the Binance exchange. And new projects have such an opportunity to get a listing on Binance after launching launchpad there. It is obvious that Binance receives part of the new coins for his services for this.
There will be some exceptions in all the cases though but here money played the major part so they probably listed after enough volume in the launch itself so they just added or listed the project but I don't see they always list a project in that way, they have some criteria to meet and also fee has to be paid for a project to get listed.