You get Chase Ink 5% cash back on up to $25,000 spent on office supplies and phone, internet and cable TV services each account anniversary year. But it's not cash back as you'd normally think about it. The card earns 5 Ultimate Rewards points per $1 spent. You can trade those points for cash at a rate of one cent each, so it's basically 5% cash back. When you've reached the $25,000 threshold, purchases in...