In beginning of 2018 there were a lot of alcoins was launched in market, Most of them was just to scam people with typically referral method by social influencers.
In 2017-2018 era, most of the projects were "successful" at that day where once they launched on the exchanges, the price would be really high at that time so many people using that opportunity to scam people for following the hype, so that innocent traders at that time will just invest on everything because of how easy to get profit on early ICO days in 2017-2018.
But nowadays new projects are having a really difficult time where the scammers are taking over at everything and I doubt legit projects even exist these days.