You mean you will be listed all tokens? I think this is not a good idea. In this way you will have thousands useless shit tokens like have Livecoin.
Not exactly "all tokens", but a selection of tokens based on a thorough due diligence process to let us find only those projects that are indeed worthy of cryptocurrency traders' attention. This process includes evaluating the project, roadmap, milestones completed, composition of team, and, if possible, face-to-face meetings.
Yes, should screen all those tokens first.
Because so many scam coins, shit coins or whatever you call them that are not worth listing for.
Should be like polo at least. And if ever you listed shit coin, just remove it once you found out that there's nothing in it.