To some extent they’ve been doing this for a long time specifically to qualify people for H1B visas; they post applications in obscure places so that they can tell Immigration that they “can’t find anyone in the US to do this job!”, but I think now they realized that it basically cost them nothing to have posts that they have no intention of actually answering to.

I get it, having lots of job posts signals growth and it’s not illegal but it’s annoying how much of my time they waste.