I certainly understand your last paragraph; we have to balance the help we get from volunteers against the amount of time and energy it takes to supervise them. And you know far better than I the extent to which this specific kind of software is easily available or not.
I think the most interesting question here, one with big implications, is the question of how to think about competition in the non-profit sector. Traditionally non-profits compete for resources all the time, money being the obvious example. If my patron philanthropist has $1m to spend this year, every $100k they give to another organization is $100k they aren't giving to me.
Likewise, I understand what you mean about attention. If you believe that you are uniquely suited to grow the whole pie with Watsi, and if you believe that similar charities forming would limit the attention you receive, it seems totally reasonable to think competitively.
My intuition says there are important distinctions to be made here, but I'm not able to suss them out at the moment. I'd love to read more thinking some day about this, especially in the context of internet, start-up-like organizations. How does a motive to serve, put in place of a motive to profit, alter these dynamics?