Wow that's not good. I don't see why some have had such bad luck with MA packs.
Only time I have had a pack go bad, it was 100% my fault. All my TrueRC cells have been fine too btw which are from the same factory. (Not all Maxamps and TrueRc cells are the same or from the same place, but some of them are or have been at one time.)
Maxamps cells I have:
1100
1650
2000
3000
4000
5000
If I had a bunch of cells/packs go bad I wouldn't recommend them either....