"kthksbai" (or similar spellings) is a "lolcat" expression. It does indeed mean OK, thanks, bye. And of course the grammar in my question, which would be incorrect for hoomans, is absolutely acceptable for lolcats. If you haven't come across them, check out the
I Can Has Cheezburger site for examples. It's one of my favourite places for a good laugh!
While we're speaking of "lol", let me ask: I can has L, plz?
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'Mercy!' cried Gandalf. 'If the giving of information is to be the cure of your inquisitiveness, I shall spend all the rest of my days in answering you. What more do you want to know?' 'The whole history of Middle-earth..
.'