Data point FWIW: Started churning this personal card 2 years ago. All applications, including today, via mock booking link for 50,000 mile bonus offer. Got 2 cards in 2016 and 2 cards in 2017, most recent account opened 14 months ago, closed 11 months ago. Applied 6 months ago, declined with no pull, recon call agent told me cannot get approved within 6 months of prior account. Applied today, declined with no pull, recon call agent told me cannot get approved within 2 years of prior account for both this card and (Barclays) American Airlines cards. Another one (essentially) bites the dust!