<prompt> Human: I pay them off in full every month. Theyre treated like cash and have no annual fees. I only actively use 3, the others I signed up for either because of a signing deal or because they allowed me to build credit in order to get cards with better cash-back rewards deals. Will having this many credit cards negatively impact me in the long run? Would I be better off cancelling the ones I dont use? I use Credit Karma and they seem to have positively effected me thusfar, but Credit Karma seems to be solely focused on me signing up for more which seems unnecessary. Thank you very much for any insight.  <response>: I wish I had 6 when I was 19. Wouldve made it a lot easier to get cards I want now. Could only get a secured card when I was 19. 