I'd look more at cryptocurrencies that hold utility, keep developing and have a serious community.
Not all active community are really legit, since they can paid a bunch shill accounts.
Do you mean they buy accounts on Telegram and Twitter? I think it is easily observed. A genuine user base takes time to create.
There is marketing for sure and shills are often spamming so much as they did with Doge and Cardano, or earlier with XVG, Iota, Nano, and anything else was pumped.