Funnily enough, the reason they switched to those was to use the data to train machine learning (AI) models, just like Google’s recaptcha was originally pictures of words from old, scanned books so they could transcribe all of them “for free” and train their transcription algorithms.
No. People who want the benefit of self housing without worrying about hardware will rent a vps or something simpler. The hard part of hardware isn’t the purchase, it’s the maintenance.
Also, why the separate router?