I'm ANSI/ESD S20.20 certified and am a program manager at a company building electronics. It's part of my job to ensure compliance.

The problem with those two companies is that they use an insulative mold release during their plastic forming process. The actual plastic itself is carbon loaded and works perfectly, but the surface is insulative so a user has no access to it. Cleaning the tools with isopropanol or acetone removes the film and restores their conductivity, but they're terrible out of the box. They've been informed, but simply don't care and won't change their manufacturing process.