Investment means having a plan, and having the resources to carry it out.
Exactly. Having the resources to carry it out is huge. At some point larger, sophisticated investors are going to be looking at SPR. They will want to see a gameplan and the means to implement that gameplan. If the gameplan contains, "We'll develop X when an additional competent developer volunteers their time and market to Y when a good marketer volunteers their time" then that investor will likely head elsewhere. But if that investor sees that Spreadcoin has planned ahead and that it has the means to bring such people to the team because it was smart enough to establish a fund, then they will dig deeper and kick the tires some more.
"Good technology/lead developer AND business sense? Interesting, I need to learn more..."
Excellent insight! I'm not sure how one would best implement this plan of action that would be fair to all parties, but the idea is sound in my humble opinion.