what are you essentially asking here is (if we take the least valuable option) is that for eg, someone has a tokened elemental they would like to have cleared, they pay someone to take that tokened creature (which gives them no profit from the ownership change that they could potentially get from selling it), in return for a fresh elemental that they could just get themselves. if the creature that has tokens on it has useless tokens, they can sacrifice for no cost, and get a fresh one , without having to pay someone to get rid of it.
if we take rarer shop creatures, its similar, if someone wanted to reset one of these, they could just sell the one they have with tokens, and buy a fresh one, generally for less coin than they just gained (tokens also have a value), there would be no sense in paying someone to take a more valueable creature (value also in age and heat, as these have their own worth too, even if just for alter purposes)
then we get to super rare creatures which for obviousl reasons, wouldnt be able to be switched because that would include things like darklings and tainted angiens.
TL:DR,(i heard people like these) youre asking people to pay for something they could easily do themselves without loss of coin