This whole pricing thing needs context…
A $20 monthly charge for 2GB server costs is not expensive, it’s less than the price of 6 Medium Latte’s at Starbucks in the US or UK.
Only need 1GB great, that’s 3 Medium Latte’s you are missing out on.
Personally I don’t go in for these kind of coffees, but I do know people who drink a minimum of 1 every working day, that’s £52 a month (~$81 USD).
And that’s if you are a single person in a company - how many expensive coffees do you think are purchased per month from the people that will use your community / forum / discourse install?
Ask them to donate the price of a coffee.