Service/Social sites instead of just members?

Have you noticed the increased on demand for SERVICES sites instead of just MEMBERSHIP sites? I wonder if there’s a tool that can be use to make S2 more ‘social’ than just membership or if this is something that has been written down on S2 road map?

Let me expand by SERVICES sites I noticed people is looking for sites that group or match people and the site is only the middle man in charge of collecting the payment.

By SERVICES sites I’m referring to (just to list few samples) :

a). sites where students can enroll to pay a monthly fee to meet with a teacher, part of the functionality is usually uploading or exchange documents, setup appointments and communicating

b). sites where entrepreneurs can enroll to pay a monthly fee to meet with a consultant, part of the functionality is usually uploading or exchange documents, setup appointments and communicating

That’s just to mentioned two samples of very similar applications sharing common requirements and it just called my attention the increasing demand of such types of SERVICES sites that could easily be mistaken with MEMBERSHIP sites just because you get to the site to pay and meet your counterpart although in functionality goes beyond a typical MEMBERSHIP site.

Any clue? input?

Just sharing and brainstorming here…