Great comments so far and I agree with most of them. I think the biggest reason is that the people running these underground labs know that they're only going to operate for a short amount of time. Well, at least the guys running domestically in the States. Likely, they start up shop knowing full-well what will happen, "We are going to ship out good product for the first month, get customers and good reviews and by the third month, we're going to bail. We're going to say that we're restocking, having shipping problems, our ceiling caved in, our family members are having a hard time, working is getting really busy, etc., and start sending out fake product and shortly after, just disappear with a ton of tax-free cash."
Most realize that running an operation like this is simply beyond their means. It looks like, by their own admission, that most of these guys have full-time jobs. It BLOWS my mind that someone thinks they can run a full-time, mega lab while also working a full-time job and having a family. They're probably thinking, "Hey, I can get together some vials, filters, some gear, etc. and if I'm suave enough and articulate, I can pull in $50,000 in just a couple of months and then disappear." So, if you have no intention of sticking around, and, if your whole business plan revolves around grabbing as much money as possible and disappearing, then we're going to have this revolving door. I just look at recent posts, where someone new comes in and within an hour we have members sending them money. That's the reason: anyone can come here and with just a few hours of work, at least get some money wired to them without a whole lot of hassle and virtually no risk.
I am in no way calling anyone out. I've gotten screwed (recently as a matter of fact) but I think we underestimate the amount of lurkers on here, that don't even have usernames, that order from these sources. There appear to be some respectable sources on here, and I'm sure that all of the members here thank you for being honest and straightforward, but I think even the novice members here are catching on that the vast majority of sources that come here are fraudulant.