A quick though.
Clones seem to be multi use. they can clone beings of all kinds of sizes to. I'm sure humans are the most cloned on earth but they most likely do it with multiple kinds of ET as well.
what are the uses of clones? the thought that started this was for extra body parts. Or food. Maybe adrenochrome if they need to. what else? Well cloned soldiers and for forced labor/ forced love companion. Want a body for a advanced artificial intelligence? yep put the two together. Looks like the use for clones is limited only by imagination. well that is it for now.