I didn't spend a lot of time and have only rolled cards on Khyber where my toons are. I spent no time on trade channels except to help one guy out with a straight one to one swap to get him cards he wanted and I didn't care which he gave back.
As you could see from my post you quoted I have played a lot of slayers - boosted by the major potion - and have played about 16 hours this weekend.
I was lucky enough to get two IXs and a X which I'll probably sell or hang onto until I get a good offer for them - otherwise there's no downside to hanging onto them. If you wanted an event as quick as the birthday bixes that's what you got - roll the dice, crunch the cards, thow away the equipment. If you want more you can have that I too. Brilliant!
As was said elsewhere, you can do as much or as little with this event as you wanted, so it has been far more flexible than other giveaways. If you wanted an event as simple as the birthday boxes, that's what you got - roll dice, crunch cards, throw away equipment - done. If you want more, you can have that. Fexible. Brilliant!