CMC and coingecko both very useful for us, i used to use both however i am confused why many coins and tokens not listing in CMC but listing in coingecko, not only coins and tokens but also many exchanges, is this because coingecko become more popular than CMC, or for something else.
The fact that there are more coins/tokens and exchanges on coingecko doesn't necessarily mean coingecko is more popular than CMC. It's simply because CMC has more rigid protocols before listing any coin, they have a required trading volume threshold to meet for instance. It's easier to list a coin or exchange on coingecko than CMC.