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.
Like for listing any coin I'm exchange have to follow listing rules. Coinmarketcap rules is harder than the coingecko and coinmarketcap is more popular than coingecko. After listed coinmarketcap all admin are happy. But I think problem is after listed CMC, still has chance to scam.