I think both theories are correct. Shit's fucked, fam. Also, cloning facilities. Also, as far as SSP stuff goes, they need slaves, but if they just abduct people all the time, it'll become to apparent what's going on, so one way to go about it is kidnapping a child, and using tech. to essentially copy/paste their consciousness into a genetically similar clone body they created in one of their labs (since the clone would otherwise be mindless, not having any upbringing and all)…
God, I feel like a lunatic for evening typing all that out, but that's what happens when you have a red pill addiction, I guess.
Time travel may also play a part. Idk, shit's so convoluted.