Thats pretty good point.
A operator can just vanish at any point in time, regardless and decide when to close up shop. That same rule of thumb goes to all cloud services.. which most people already ignore though, so whatevers. lol.
True, but some are more likely to run than others. Not all operators are equivalent. You have manufacturers that are running cloud mining services and you have cloud mining services that buy hashing power from those manufacturers. It's extremely unlikely that established ASIC manufacturers will run away with your money. It's far more likely that a cloud mining service which refuses to provide information about itself will do a runner. That should be obvious to everyone.