I'm seeing more and more of these sites/solutions spring up but none of them seem to really work. Why? My thoughts: Partly an issue of signal to noise / matc

I'm seeing more and more of these sites/solutions spring up but none of them seem to really work. Why? My thoughts: Partly an issue of signal to noise / matching, finding the right person in the first place. Partly frustration at unsuitable cold calls through cofounder matching sites (I listed on one to see if I could find an additional technical cofounder and got a ton of business contacts in areas that were totally mismatched to my interests and skills). Partly lack of obvious second step, in a way. Exchange emails, meet, decide what to do next (small project or something, parallel with dating pre-commitment, I suppose). But this isn't foolproof and is very high-touch. Maybe this is just me though.