I think most "remanufactured" stuff is crap.
Years ago, I used to very heavily use a few HP lasers, and used the "recycled" cartridges for it. They used to come with a prepaid return bag (
green plastic too); all looking very authentic.
They worked, but the cartridges I was getting never showed the slightest sign of ever having been inside a printer previously. They also had about half the printing endurance of the HP ones. They were half the price
The obvious conclusion is that this was a scam. It was an operation selling crap quality printer cartridges, capitalising on peoples' guilt over the environment (never been done before, has it
)
I have since tried the cheap inkjet cartridges and there were very poor too. OK for B&W printing, but B&W lasers are so cheap now that anybody doing enough B&W printing on an inkjet ought to consider getting one of those.
So now I don't bother.