I was just going to say, if the problem is that you are losing money due to the popularity of your free app, the clear solution is to charge for it. Either peop

I was just going to say, if the problem is that you are losing money due to the popularity of your free app, the clear solution is to charge for it. Either people will pay, or they will stop using it. Now, that's a bit cynical, and given the OP's concern about keeping it free for those in need, there are a few variations on this: * Only charge for the 'pro' version which has more features/no throttling * Charge based on licensing requirements, or some other requirement that people with money would care about, but those without do not * Charge via microtransactions, but offer free credits to nonprofits/those in provable need