Pricing, whether for projects, hourly rates, or for SaaS / PaaS products can be tricky. Luckily, there are so many examples to draw from.
https://plato.stanford.edu/support/SEPIA-dues-schedule.html Stanford University has an online encyclopedia of Philosophy (which should be a wiki but they built custom software instead!). They charge a one-time fee to all institutions conferring Philosophy degrees to become members (offering a small list of benefits). The pricing is segmented by geographic region and country to level the fees according to the income standards for countries across the world. While the fee in the US tops out at $15,750 the fee in Mexico is $630.