Finally!! 5 tries later, Discover does luv me! CLI !!
Got this card in October 15 with 5500 SL tried CLI in Jan got moved to 6000, tried again few weeks later nope, again in Feb nope, then in March, moved to 6500, tried in April at 6 mo anniversary nope, again few weeks later nope, few days ago once May came around have it one last shot, I had basically given up after all the "insufficient experience w credit limit" letters .. logged in to check balances and FINALLY! Discover pushed me up to 8k, whoohoo! Ok dun for now. ..