I was surfing coinmarketcap website for new added projects just to stay on point but i saw few projects that was listed on CMC with ridiculous trading volume, imagine a project having only 3k traing volume get listed on CMC, my question is why did CMC list such project in the first place?
Our view is that we should always over-provide data (as opposed to censoring and policing information) and let our users draw their own conclusions.[1]
That is from coinmarketcap.
Apparently, coinmarketcap does not mean that they do not filter. They do filter their listing, however, if a coin can provide all the necessary requirements and has open and smooth communication with them, they will probably be admitted. Whatever happens to the coin before and after getting admitted is beyond coinmarketcap's control. If the coin suddenly turned into a shitcoin in the months that followed after listing, they will probably stay there for a while until notice is given to CMC regarding the status of the coin. It might get delisted eventually.
[1]
https://coinmarketcap.com/methodology/#listings-criteria