a few millions? haha. you seem to have never checked the volume that some of the shitcoins have when they get pumped! it is more like a few thousands.
not to mention that OP is mainly talking about profit making although it may not be obvious from the things he said. and making profit is so easy when it comes to pump and dumping shitcoins. there are  coins that get pumped >1000% with 0.1-1BTC. it may seem like a small amount of profit but you should know that this is happening on a daily basis on a couple of different shitcoins. so the aggregated profit is huge.