Regardless of what you think of the pricing, the dev is not a "scumbag".

I used Sync for Reddit for many years, and he is without a doubt the most responsive and accommodating app dev I've ever encountered. Always updating the community, always looking into improvements, and always friendly and helpful. Not to mention extremely skilled at what he does, as you would discover if you tried Sync (even in its free form).

Your accusation is absolutely over the top and completely contrary to reality. Of course you're free to use whatever app you like, and to disagree with the Sync pricing policy. But there's no need or justification for talking about him like that.