On or about September 15th of this year I applied and was accepted for my first 3 AMEX cards, the PRG 50k (targeted), SPG regular, and Delta 45k. I also got 2 Chase cards in the past 6 months, so I have 4 hard pulls in the last 6 months (3bm didn't completely work, some applications got frozen). I just got an offer for AMEX Blue Sky for 400$ in cashback travel expenses back after spending 500$ in 3 months. It's also a free card, a good way to build history with AMEX given that I plan on churning the other cards. My question is, is this too risky? Will AMEX likely reject me or even worse, initiate an FR for the 4th app in 2/3 months? I should add that by the time I have to apply I will not have necessarily paid any bills from the SPG or Delta because AMEX their statement dates to late November (long story), the time my targeted offer expires. Please advise.