yes indeed that's true that my friends has complained while playing poker at the particular sites and at the beginning of play he felt suspicious because his opponents always get good cards untill end of game but i think every poker sites are risky to play because we never know those sites cheating us or not but maybe it will different if we playing poker with physical casinos against other people
I think if we are talking about big poker sites, then that should not be a problem. As long as they have many players they just don't care if we win or lose, because they will get their rake, and users are playing with their own money, so it's only profit for them. They don't have to risk that, by trying to cheat you with bots. Of course if it is a new site, or a site with a low player base, then you might get suspicious. The problem is, that at least with BTC, I don't think we have poker rooms with a large player base.
You might be right there are some old casinos, and they are running from many years. So they already in profit and they don't want to cheat people to make money. The house edge is enough them to make a profit. Maybe those sites will not cheat players, and you will find only legit players. But we can not able to guess which site is good and which is not only the real experience will tell us.