Maybe a small disagreement: JetBrains does work on a form of subscription mode, right? About once a year I pay an upgrade fee for IntelliJ, RubyMine, and PyCharm. This is a recurring cost, but the advantages of have up to date IDEs far out weigh the "subscription cost." What is the difference between "I want to have" upgrades and subscriptions?
These are working tools. Their cost should be a fraction of the revenue generated with them. Sparrow is not a revenue generating app. It saved some time to the users. That's all.
Out of curiosity, is there a reason you bought RubyMine and PyCharm in addition to IntelliJ? The paid edition of IntelliJ includes access to the Ruby and Python plugins.
