This weekend is a 50% rebate sale on EQ2's Station Cash store, which includes expansion packs and non-recurring paid subscriptions. This is not an especially great time to buy Station Cash - a double SC sale, which happens more frequently, lets you pay half as much for the SC you want, while a rebate sale requires you to pay the regular price and gives you SC back afterwards. It is, however, a spectacular time to SPEND Station Cash.
A few weeks ago, I decided to spend $20 for 6000 SC at the last triple SC sale - enough to cover the 4000 SC expansion and a one month non-recurring subscription for 1500 SC so I wouldn't need to start paying for gear unlocks again until I hit the new level cap. For some reason, though, I held back on spending the SC after paying for it. My patience paid off.
That $20, tripled and then instant-rebated, bought me the $40 expansion, three months of subscription status (3897 SC) and still over 2000 SC left from the most recent purchase (4352 total counting a previous balance). The tough call now is whether to extend my subscription out from August through November (leaving me with around 2000 SC left after the rebate) or hold onto the balance in anticipation of being charged 4000 SC for another expansion in December.
Anyway, PSA: If you already have SC and are looking to buy stuff in EQ2's store, this is a good weekend to do so.