Ah thanks for mentioning Foursquare - I meant to list it. It's another one that has a huge upfront cost for solo devs building a commercial app ($600 / month).
> It's another one that has a huge upfront cost for solo devs building a commercial app ($600 / month).
Yeah. :(
This problem seems to extend to the whole industry. Everyone charges big bucks to even very small players. We want to solve pieces of that we can, but it's a tough road to build quality databases.