Then you can instantly discard 95% of the altcoin market. Most projects hire devs in order to improve implementations or to add extra features other coins have been rocking for years, all to please their noob backing.

Yobit for example has coins listed that haven't generated even $100 in 24H volume once in the last 12-24 months. In the same way, Binance is dealing with a large number of shitcoins as well.

People make fun of exchanges as Coinbase for not having many coins listed, but they forget that this is how an exchange should be operated. The majority of the altcoins are nothing more than pest that should be eradicated immediately.