For many apps the issue isn't feature removal but sandboxing. https://panic.com/blog/coda-2-5-and-the-mac-app-store/ https://panic.com/blog/coda-2-5-and-the-ma

For many apps the issue isn't feature removal but sandboxing. https://panic.com/blog/coda-2-5-and-the-mac-app-store/ https://panic.com/blog/coda-2-5-and-the-mac-app-store/ MAS requires sandboxing, distribution outside the store does not. That said, Apple turns the 'default sandboxing' screw another half turn with every release. In addition to subscription revenue, upgrades are possible by releasing a new product version (e.g. "OmniGraffle 7" in MAS) with a free tier ("read-only mode") and in-app purchases for new users as well as upgrades from OG 6. I believe you can read purchase receipts within your developer team to determine upgrades.