PSA: Character slot voucher doesn't grant an extra maximum slot.

[Lorelei]

Maybe it was made apparent elsewhere, but I found out the hard way that if you already claimed the free slot from the warlock event (or bought additional character slot vouchers from the store already), that buying the character slot increase offered with the 1-year anniversary event doesn't actually increase your maximum character allotment, so don't buy it if you're already at max, unless you really want the event coins. Mine is just sitting in my mail until gunner comes to NA, I guess.