I personally, don't spend money on mineplex. Which means that I can only get crates by earning them or doing things like linking my player to this site. But it's annoying, when both of the crates I've opened, have given me broken items. I have the Bubble Fairy Particle, as well as the Rain of Arrows Arrow Trail. The only things they do, are give off black sparkles. I thought it was weird, but probably a coincidence, then found out they are supposed to do other things and not black sparkles. For being the things you work to get, its annoying when they're broken.