I am member of all of them. but I have just invested some money in cloudmining.website. because of their low deposit, I invested 0.01btc before more then 20 days (not exactly remember) since now I just earned 0.006 btc and haven't got payment yet because minimum payment is 0.01btc. may be if someone deposit a bigg ammount he can earn cashout limit every day.
If the scheme is new maybe you can withdrawl for sometime. But any moment it can finish and you lose all your money. Some people try the luck and invest in the most newest schemes hoping to get some profit, very hard, but maybe you can do it.