Usually when you wanted to know if a project was worth following were the number of people that put the token on their watchlist, but I'm afraid it's not a valuable parameter anymore.
Many unknown coins/tokens have an insane amount of people that put them on their watchlist in a very short period of time, for instance, a token that's been added to thousand lists in like minutes since their listing on CMC, very strange.
My question is, people can really buy bots on CMC that could do that?
I doubt that you can buy "official" coinmarket-cap bots from coinmarketcap itself because if that would be the case than coinmarketcap would be a fraudulent platform and they would not risk to do such a thing as they belong to binance now and this would also mean a lot of harm and very bad reputation for binance itself too.
I guess what happens at coinmarketcap is simply the same what is happening on every other platform too, people or companies made a huge amount of accounts and use those to vote for something in order to create awareness for that project. I also think that there are people that are offering to boost your project with a lot of fake votes from fake accounts.