1. Watch for mailers from American Express for Delta SkyMiles cards with a big bonus and small spend (e.x., 70,000 points for $2,000 spend). Reportedly some of these have no lifetime language attached to them, so you can get the bonus even if you’ve already gotten it in the past.
2. Do you have a P2 or a close friend with an AmEx card? Have them refer you for a Business Platinum card. The referrer gets up to 30,000 membership rewards and the referred offer could be as high as 110,000 membership rewards. If the offer isn’t showing as 110,000 points, try incognito, a mobile device, FireFox, Edge, Safari, standing on your head, and/or a VPN. It is around for most with some effort. Note that there is a high $15,000 over 3 month spend to earn the bonus on the cardholder side, the referrer gets the bonus on card approval.