Page is a not externally linkable
-- Google SEO News and Discussion
---- Matt Cutts asks webmasters: let googlebot crawl js and css
agent_x - 9:30 pm on Mar 28, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4433745.htm
I don't really see any issue with bandwidth, in my experience so far Google only seems to fetch CSS files once every couple of weeks or so. It's not something you tend to change that often after all.
Brought to you by WebmasterWorld: http://www.webmasterworld.com