overwhelmed sourcing manually are lead lists actually worth it?

Been doing OA for a while and sourcing manually is eating up a lot of time. Starting to wonder if paying for a lead list makes sense but I’ve heard mixed things some people say the leads are saturated by the time you get them, others swear by them.

Has anyone here actually seen consistent ROI from a paid list? What should I even look for when evaluating one? Member caps, lead frequency, category focus?

Not looking for referrals just want to know if it’s a real time saver or a waste of money.