I'm sure you know this but costco's been and will be a freedom 5% category for almost all of 2016.
Might inspire me to finally get a costco membership. I used a 1-day sam's club pass last week and found it's way too much of a hassle to drive there. Got a giant seahawks colored cooler however.
yeah, april-june is a bit of a lie tho, since costco has only been taking visa for about a week. but i'm super excited about july-december.
my guess is chase wants to establish in the costco customer's mind that costco now takes all visa cards, not just citi cards. maybe that makes sense, i dunno. i do know they're gonna get raped to eff and back on costco purchases.