[Apogee]

Hmmm - single stamp sale: List cost - % varies from zero up sells - 3.5%? been a while. Stamp for free shipping - ≥ 100% so we have a greater than 200% loss on this item. Any one doing this is either not thinking, or very shrewd indeed (wonder who their buyers are).

[nascarnation]

Post 42 had one possibility - legally making you a junk phone call target.
Other than that I’m clueless, LOL.