I've been thinking about this.
The prices are often based on salaries in highly paid countries.
My country (The Netherlands) is far from poor, don't get me wrong, but we make WAY less than some developers in the United States make.
If a US developer makes $120k and a service costs them $30 monthly it doesn't seem like a big deal.
That same service can effectively be 3 times more expensive if you make a third of what the US dev makes.
Should SaaS / PaaS / etc. have purchasing power parity? (PPP)