I hope that for 10€ most people will find it worth it. If you've already spent 60$ or more on Sublime Text and upgrades, I can see why this might seem weird. However, as the homepage says you can basically install it and use it for free as long as you like. You'll get a popup occasionally (if you do use it), but that's the only "restriction".

Also, for a free alternative, I have to mention https://github.com/kemayo/sublime-text-git which inspired SublimeGit. There are way more people using this, and it's been around forever. Personally I like mine better of course, but I realize that different people need different things :-)