i don't think so.
because people usually don't use good strategies and they are wasting their money in most of these gambling sites.
Strategies don't affect the EV of a gambling game where it isn't PvP (bustabit, which has a PvP aspect can become +EV), so using a "good" strategy doesn't change the EV. Going all in at a 2x multiplier is probably more effective than maritangling to double your money, as you would be paying less of a house edge.because people usually don't use good strategies and they are wasting their money in most of these gambling sites.
for example i have seen new dice sites that start off with a 0% house edge and there aren't that many winners on the site to win and bankrupt the casino.
It's about luck if it's a 0 EV site. The house isn't expected to make a profit, or lose, which makes sense that the site didn't get bankrupt.house edge is like a guarantee in my opinion.
Safedice: Someone won a 2% chance bet with 2 BTC against a 7+% house edge, causing most investors to have a huge loss.and also add to this, the fact that a lot of the gamblers will continue gambling when they win and if a losing streak hits them they lose all they have won so far.
Winning streaks might cause them to stop and cashout.If u still disagree, u may place bet and try to loot the bankroll of www.bitcoinbetting.website to get the hands on experience. 
That is the reason I'm not investing. Playing on bitcoinbetting.website has the same expected value as investing, which is 0. The truth is that the expected value is 0 - no expected profit or loss. Talking about strategies doesn't change anything, nor does quoting a post which doesn't affect the expected value at all. If your talking about profiting off of variance, I'd rather invest in SafeDice where the amount wagered is the highest proportionate to the bankroll, and experience high variance there with still and expected profit.