I see the option to purchase Sync Ultra already, so folk who are looking to get rid of ads asap can just subscribe.
I definitely understand why a "pro" version would be ideal for a lot of people, but I've been using Sync for so long I think I'll go the subscription route this time to support the ongoing development!
Yup, feels much better giving small devs monthly income vs some filthy corporation that forked their content from another platform to ask for more money.