There Are many exchanges where exchange authority listed shitcoins only for money and later, they delist these as like responsible Exchange owner. Let's Have an example With MEXC Exchange! I saw some coins Pump from 600% to 18,000%, many coins pump more than 13000% and that's make me wonder. So i also tried to buy new listing altcoins.
But i experience that, New altcoins already pump 300-500% within seconds. Lol. Although i had opportunity to buy overpriced coin cause some coins goes more than 20000%. But i did. And later team create more hype so that more people joined with then. And after a certain time, team dump their share and run away.
So should be careful such shitcoin games. It may increase your money thousands time but i think, people will loss more than gaining
For that matter, I don't think that happens only in Mexico; rather, other exchanges often do that, to be honest. So that's not new. Although traders who use an exchange still need to be careful, You should still make your own way to find out if it is legitimate and if it really has potential.
Now I was just curious about what you said: there was a 13000% and 1800% increase in the shit coins you are talking about. Can you identify here the coins that increased by that percentage? Yes, I know that many coins in MEXC rallied really hard, but I don't see the increase of such a percentage in MEXC.