It's cheap. I use it ten hours every day. It costs less than I would charge for an hour of consulting. Ok so I do live in one of the most expensive countries in the world but even in a developing country a developer don't have to work long to pay for this license for a tool they would use a lot every day.
Less than one hour working time for the core software used when developing is cheap.
A lot of software is very under priced in terms of value. The App Store and SaaS copycats pricing doesn't reflect the value or the cost of software - you need big volumes and many go bust due to no profits.
I paid for ST2 in 2012. Five years later the upgrade price is only $30. Should have been more.
