It depends:
a) I subscribed to his chat room when he was still relatively unknown and didn't have as many followers (could be more than 2 years ago), and he seemed to actually have trading skills. I learned his approach, understood it, and believed it may be viable.
b) The answer may actually be "no", because I follow several prop firms on Twitter that trade the exact same stocks. And I see plenty of Tweets about the same stocks outside of Ross Cameron's camp. There are only several penny stocks (or micro-caps under $5) that release meaningless press-releases each day, so everyone trades them.
c) Many penny stocks are pumped and dumped through various marketing schemes, while many prop trading firms follow and trade around those moves, so finding or detecting pumps and dumps is a very viable trading strategy. Tim Sykes got rich off of shorting penny stocks that were heavily promoted but didn't have reasonable fundamentals. And really this is how many people make money - on high volatility, regardless of the reasons, or possibly because of understanding the reasons. Microcap stocks have small capacity, but some people did make their first $million on them.
d) I also have mechanical/systematic strategies for trading these stocks and I'm actually streaming my own micro-cap trades to Twitter, and often these turn out to be the exact same stocks that Ross Cameron trades, as well as Seven Points Capital. Except I mainly go short and often in opposite direction to Ross. I just wait longer (often overnight) for all that trading to be done and the price to drop back where it's supposed to be. I couldn't replicate his long strategy, but at least I'm able to trade the same stocks regardless of who is pumping them, but they do get pumped multiple ways and Ross is not the only trader with thousands of followers.