It's definitely not worth the wait.
One $5 GC= 450
450 x 5 = 2,250
One $25 GC= 3,150
It costs 900 MORE Swagbucks to get one $25 GC then it does to buy 5 $5 GCs. I don't know there logic behind doing that, but I'm sure plenty of people have caught on.
NOW, if you are making tons of Swagbucks and you can only get 5 GCs a month, you could just get a bunch of $25 GCs. Of course, I've NEVER made enough for that to be feasible. LOL!
Sorry, I'm a bit of a swag dork sometimes.