Testing.

[BNLFL]

Ahhh that would be good but I don't really trust people with my money lol apart from the odd random chinese person at the other side of the world I know nothing about and send good amounts of crypto to.

Well, you pay the person organizing it, and it's not always crypto. In fact, with all the stuff I have I've never used crypto. Most GB are US based. They ones I use have been around, do these often and use big name suppliers. They will be sitting on your money for 6 weeks to 3 months. That's why it's a not I need it now or Amazon. The money difference is crazy on some of them.

 

[exploitedworkerbee]

They know people get their product tested and 1 bad test would be devastating to their business.

This is an incorrect assumption. Plenty of well-known vendors have caught bad results from post-purchase testing and manage to flood the zone with shillery until the bad test results get forgotten. And not just under-fills. Hair and bugs in vials, vials containing the wrong substances, failed sterility, way too much of the substance on the label, endotoxins, all have occurred and eventually get forgotten.

If your assumption was correct then all the post-purchase testing groups would be getting great test results all the time. Nope, they catch bad batches constantly.