As long as you and we are sure that you aren't infringing anyones copyright and are not blatantly selling direct copies of another companies chips and they complain about it then I don't see a problem. (So your EDS example is a bad one and hopefully not your only one)

The customers can make the decision as to whether or not they want to buy a brand name with technical backup, or want to buy a no name copy where the seller has no knowledge of the internal calibration. No different to eBay i guess and an idiot and his money are easily parted.

Sounds a crap way to make a living though, just ripping off other peoples work and not actually recalibrating anything at all, but but hey theres plenty of so called chip suppliers all other the world doing just that sadly.