@troed We'd also like everything to be open source. But the reality is that even with AGPL, we're still stuck in the pattern that enormous deployments use FOSS Synapse without contributing to its dev/maintenance costs.
Every time an opportunity that we're counting on to fund the team turns around and says "oh, FOSS Synapse is good enough, and we can use it for free, bye" we find ourselves needing to provide a very concrete reason not to freeride - hence Synapse Pro.