Non-profit and socially conscious post-MBA careers

Thanks for starting this thread, Toubab. I'm also interested in social enterprise and have attempted to seek out others in that boat at each of the schools I've been accepted to. Lots to discuss herein so not sure where to even start. A few thoughts off the top of my head:

1) social entrepreneurship is a hot and growing sector. Most schools now have clubs to support these interests. Oxford has the leading social entrepreneurship center in the world and manhy schools now have concentrations in this area which are appealing.
2) unfortunately, social entrepreneurship, social entreprise, non-profits, humanitarian aid, etc entails so many different fields that they are often lumped together which makes it tougher to get info on certain fields that one may be interested in (poverty relief/microfinance for me which is very different from climate change or health issues, etc).
3) further, within this growing sector the distinction b/w for profit and not for profit enterprises makes a huge difference in the way you run the company (take for example equity stakes from VCs in for-profits versus the not-for-profit bylaws which significantly limit standard equity investments OR take for example measuring a bottom line in SE with profits and social impact versus measuring a bottom like of a non profit with purely social goals- big differences).
4) I think pay in this arena discourages many from entering it. For me, it's worth it to make a difference in others lives and follow what I feel called to do rather than make millions in the private sector. But on the whole, this will discourage 95% of most MBA students. However, I see this changing and have heard from those within the sector that pay is increasing to compensate what many investors see as more and more valuable.

Just a few of my thoughts. For me, I'm having a hard time deciding between using the international appeal of LBS to pursue this career path or whether I should attend Chicago Booth, which while it is less international in nature and focus, would still provide many great opportunities in the sector and probably allow me to end up in the US/Texas in the long term much easier. Then, there is Texas which has a social enterprise concentration (unlike the other schools) but I went to undergrad there and feel obliged to attend Booth or LBS due their ranking, profs, brand names, etc.

Finally, what if I end not truly liking or wanting to pursue this career path and want to enter the business world, have I then shut myself out from those opportunities by focusing solely in this area? I'm trying to find a good balance in my school choice.