I know there’s a lot of this, but what is the angle? Who is running the bot farms to click on Facebook ads and sign up for random services? And what are they hoping to achieve?
My wild assumption is that bot farms need to look like regular users, and therefore keep clicking on things even when they're off the clock. If Facebook has caught up on click farms that click on links but do nothing afterwards, I would assume that filling in some random data goes a long way to make bots harder to spot once your actual clients show up.
When you set up an ad on Facebook (and many other ad services), you can define a "conversion" (I'm more familiar with how google calls them, I'm not sure if that's what facebook calls it.). You can read about it here: https://support.google.com/google-ads/answer/1722022. Then, you can set a target "Cost Per Action", which factors into your bids and therefore how much you spend on advertising and where you advertise. That's why if you're doing ad fraud, you'd want to take it all the way through to whichever action "counts".
