Starmaker: Yes. I found
this post, and I remember (but can't find) a thread someone made complaining about their refund request, in which a blue posted a denial of said request to the effect that "your 'I didn't want this game' doesn't hold water: you wanted a random game, you got a random game, deal with it".
Because they didn't emphasize "YES YOU CAN GET REFUNDS" but linked to the longstanding policy in this promo, I suspect its practical application hasn't changed, the random generation of a game from a mystery purchase counting as "activation" for the purposes of withdrawal.
The post you linked to says that refunds apply, even though that's not from the current sale. The FAQ is, and since their refund policy includes
the clause blotunga quoted earlier, it really doesn't matter what the reason is - if one hasn't downloaded any content, they don't need a reason.
We seem to be disagreeing here, but I'm not sure over what.