Rather, if it was coming from someone with less rep it would seem weird - I have friends with Comcast (I never got used to the XFINITY name) that I know are only using one or two accounts; since I couldn't offer any kind of guarantee I would just supply one for free and hope it lasts for a while.  Do you mind if I ask what you intend to use it for?  The primary thing that comes to mind would be a login for various TV channels that offer VOD/live content with a cable account login (feel free not to answer even if that is the situation or feel free to PM).  Note the invite to PM applies to OP only... as much as I'd like to toss buckets of logins to the BCT public, I simply don't have the means.