Check your upgrade offers: How I upgraded my Amex Gold to the Platinum

Sometimes, you get an offer you just can't refuse — even if it means letting go of one of your favorite cards.That's what happened to me as I scoured the internet for a high welcome offer on the American Express Platinum Card®. Everything about the card's benefits excited me — from its lucrative Resy statement credit* to the digital entertainment statement credit* and expansive airport lounge access for eligible cardmembers, even in exchange for its $895 annual fee (see rates and fees).The Amex Platinum's welcome offer is targeted and personalized. New applicants can find out their offer and see if they're eligible for as high as 175,000 bonus points after spending $12,000 on purchases in the first six months of card membership. Welcome offers vary, and you may not be eligible for an offer.I had been a happy American Express® Gold Card cardmember for a while and wasn't looking to upgrade or product change.However, when I compared my highest personalized Platinum offer (80,000 bonus points for $8,000 in spending on purchases within six months of card membership; offer no longer available) to the offer I'd get for upgrading my Gold (125,000 bonus points for $6,000 in spending on purc...