I see you are adding new features.
I am currently considering to upgrade.

However, I use more than one counter, and upgrading all of them would be a little expensive,
just for counters, and some 100 views/month, at best.

Altogether I use maybe 10 counters, and the visitors come from totally different countries at each place.

How about, to have one pro account, and this would be good for 100k or 1 million monthly views?
Set up as many counters as you like...

You could also offer different types of pro accounts, some people just have a few 100 views each month, and maybe would consider 10$ or 15$/year, but not $30/year, especially not for more than one counter.

I am only considering it, because you added region flags for so many countries, and the data is quite interesting for me.
Would be nice if I can have it for all of my counters, but $300/year, for just a little information? that would be appreciate for a commercial domain, not for personal usage.

So maybe, you can implement this:

-a personal usage subscription price plan
-to have as many counters as you like for one pro account