That's the thing. The only people gaining are the people that initiated the pumps. They're smart. As soon the shit coin goes up buy 10-20% they sell to people buying after the 10-20% up. Anyone who buys after that is stuck with those coins because no one is going to buy a shit coin that is up that much. They end up selling at a huge lost (sometimes 70-90% lost). It's a scam that works well for people who organize pump and dumps.
Yep, the way most of these works will involve someone randomly shilling and then organizing a group of people that are willing to pump a coin up 50% or so of the current price, but oftentimes they own a large amount of the shitcoin already.
This results in 2 scenarios, where you are basically all helping this single investor who works or has a large share in a coin earn a shit ton of money, OR
You are likely going to get the prices up, and then the person who undercuts everyone (say they sell at 20%), fucks everyone over.