I'm interested in using PlanetScale.

Would you happen to know the magnitude of how many simultaneous connections could $348/yr buy me in PlanetScale?

One of my clients hovers around 50 simultaneous connections to their main MySQL server on a normal day, but they have bursts of 3k simultaneous connections for an entire day, twice per year.

Their workload is about 5% writting (INSERTs, UPDATEs), 95% reading (SELECTS).