Here you have some of the reasons I have for not finding the stories of massive numbers of human abduction stories. An advanced interstellar traveling race would not need to abduct more than a few humans to gather the info necessary to manufacture a virus or perhaps nano machines that could do all of the things which implants might do.
With a custom designed virus or self replicating nano machines infection of a handful of humans strategically placed around the world in a few months nearly the entire world would be infected.
Why bother abducting huge numbers of individuals?
No one authoritatively seems to know—that’s convincingly come forward.
The more plausible guesstimate seems to be some variation on the following . . .
helping set up, enforce and run the globalist government strictly according to the world leader’s edicts and preferences . . . with a minimum of risk and conflict all up and down the different ranks and classes.
or . . . as some put it . . . to enslave, robotize, coerce the masses to comply overwhelmingly and precisely as needed amidst varying levels of chaos, terror etc.