Earlier quoted context omitted.
I mean, we have 89 contributors... What are your concerns with AGPL? The practical difference is the clause that SaaS distributions require to be licensed as AGPL as well. Would you plan to take this, add commercial features and repackage as commercial closed source system?
As someone who would love to contribute: AGPL means nothing if I have to sign a CLA that gives you the ability to switch licenses on a whim. You will have much less contributors for this reason alone, while also scaring away customers.
If the investors eventually stop paying the bills (or if the set of people that want to contribute is larger than the set of people the investors will pay), then fork it. This seems like a win-win, in that developers win because they get Free tools, and in that developers win because the get paid well to develop open source software.