I actually don't get why you are all complaining, the site lasted very long lol You could have easily turned a massive profit had you invested even somewhat late. All ponzis will collapse, it is gambling you win or lose, I don't think the dev actually ran with the money I think the ponzi just collapsed, big difference.
Well, as previously mentioned, that is totally up for debate.
Of course all ponzis fail and collapse in the end, but depending on the admin's willingness to continue, it can last for a long time. The thing with Flexybit is that it was the exact same thing as Honest Doubler, if you remember that. It had constant new deposits coming in and really there was no reason to shut down round 1. Even if round 1 shut down, why did #2? It had by far the largest deposits.
Again, totally up for debate. The main lesson here is GET IN QUICKLY. After that never invest in the same site again, you'll be thankful in the end.