I really doubt people would even try to actually use them considering 333 MH would make about 3 cents a month not counting electric which obviously, anywhere in the world, would put you in the red no matter what. If I were to do it, I'd solo mine. If I solved a block with one this forum would never hear the end of it.
https://forum.give-me-coins.com/discussion/898/lucky-block-erupter
ehm not the same thing, there is an old thread talking about the difference between finding a block in a pool and finding a block in solo, the latter is much harder
there are different odds, if that that guy was mining in solo in that time instead of mining in a pool, he would not have found anything