The problem with these flippin' border thingies is mainly that it's all pretty boring to do .. because once you know there
is a border .. and because in general they are
all created with a similar format to each other .. you can simply fill in loads of the grid without even having to pay much attention to the clues .. :?
The only advantage I can see is that adding borders gives the authors an easy 'leg up' the leader board as borders increase the points .. often dramatically .. making the Griddler worth millions of points rather than it's true thousands of points ..
Personally I simply do the borders as fast as possible to get rid of that part of the Griddler.. then I can settle down and start tackling the 'real' part of the Griddler ..
I'm sure the 'borders' are mainly unnecessary, they definitely add nothing to the enjoyment of completing the Griddler and because everyone gets the 'extra' points ... in the end adding the border is simply a valueless exercise ..