On the first day of the sale, I bought five pinatas. Realizing it was a mistake when all of the games were ones I would likely never play (two of which I really didn't want in my library at all) I decided to refund them. I'm still waiting for Support to respond to that request. Aside from that, I bought one game today and that's all.
All things considered, this is easily the worst GOG sale event I've seen so far. I hate the gimmick of getting random games, and with only 100 games for the sale in total, only 50 of which were available outside of the pinatas, it really doesn't feel special at all to me. More like a slightly bigger weekend promo and weekly staff picks, to be honest. It doesn't help that a lot of games just don't have very good discounts.
That's all just my opinion, of course, and I'm glad that some people had fun with it. Personally though, I'd rather we not see this one return.