A subscription keeps the developer's incentives in line. If you buy a piece of software, what incentive is there for the developer to fix bugs and security holes in the older versions?
Anyway, why would a $30 purchased app become $30/year? Nobody prices like this. Photoshop used to cost $585. Now it's $10/month. I think a $30 app would probably become $1/month.
Anyway, why would a $30 purchased app become $30/year? Nobody prices like this. Photoshop used to cost $585. Now it's $10/month. I think a $30 app would probably become $1/month.