If you find that you keep wanting to remind people of this, you may want to add it to the main post more prominently. Such reminding is currently coming off as badgering to me, and likely to other people as well since both of your reminder comments are getting into the negatives.
Sorry about that! It's difficult (for me at least) to express tone over the Internet. I'll have to practice that.
I asked this question for the Q&A:
I also recently asked this of Luke for his feedback post before the Q&A was up, and he mentioned in his response that SI is continuing to grow the Summit brand in a multifarious manner. Luke also asked me for additional social business ideas, citing a lack of staff working on the issue.
Less Wrong's collective intelligence trumps my own, so I'm fielding it to you. I do have a few ideas, but I'll hold off on proposing solutions at first. I find that this is a fascinating and difficult thought experiment in addition to its usefulness both for SI and as practice in recognizing opportunities.
Edited to add: I posted my own ideas concerning SI and social business in the comments. What are yours? Also, addressing some valid points made in the comments, what are some other innovative ways to fund SI?