HipStamp Sales - Paying Sellers?

No Anghus. You are reading further into this, than I suspect I or eyeonthewall wanted to delve into. There are plenty of threads on specific sellers who have been scrutinized for one reason or another. This was an EFO sale, and as such the 2 biggest efo sellers were targeted as being overpriced, even with hipstamp paying sellers to price lower.

In the end the stamps are still marked up, but in EFO land, there are few choices for materials. Sometimes you have to pick your battles.

In the case of bills, interestingly, a lot of his material is consigned. So you may be able to negotiate a lot...
Whether you want to engage with him is a personal choice.

"He was referring to several sellers who flood the market with their listings obscuring all other sellers listings"

and

"So the problem is just the quantity of their listings, not the quality or truthfulness?"

The issue is not the quantity of listings per se, but rather the quantity of overpriced listings, and in the case of Langs there are additional issues.

"what does "Billy and Stu or any of his other disciples" mean? Who are these people?"

Billy is Bill Langs, Stu is Stu Katz. They have a connection, although I am uncertain if Stu has all the other issues Bill has.