Bonus values are however many outside territories the bonus has, -1. Though some may think it unbalanced, I think it makes for a good strategic map--rather than focus on expanding, you must focus on defending. It's not at all easy to win.
Note: This map was made with FFAs in mind. In 1v1 situations, it can become quickly unbalanced. 4+ players recommended.
Also, apologies in advance for the huge file size for such a small map; I didn't want to have to make the islands five times bigger than they are.
Version 1.1: Fixed visual problem described by Nathan.
Challenging map. I give it only 4 stars because of the visibility issue. I get why the mapmaker made it the size he/she did - that's not the problem. Rather, the 7 (at least) layers of outlines around the land are bright enough to make the territories blurry when they are of such small size. I would recommend darkening the outlines and/or reducing their number and/or increasing the stroke thickness on the territories themselves.
Other than that, this is a fine and challenging map.