I'm not sure how long the marbles will remain intact, but I do know that there is a very high percent of damaged marbles. You can "pretty" them up and make them sparkle, but in the end, they're still jabos. Not to be played with...
I don't think what you are saying is wrong...and I applaud your speaking out. But there's a strong fan club for these jabos and unfortunately, you will get blasted for saying what you think. so much for "friendship".