I think it would be nice to thank once in a while for "free" stuff we've got so here it goes:
Out of almost 200 boxes (of only 2 accounts I'm taking care for now) I actually got over 70% of useful drops so it's quite a good rate so Thank You SDE!
FEW thoughts:
Still I think that in the long run you shouldn't mix 2 features all in one. You should dose attendance events with exp events separately not all at once. Afterwards people are spoiled so much more by it so it's quite harsh to get to "normal" exp and no items.
You should consider similar attendance event with olive only gifts but with small ammounts of olives (1,5,10 etc. and 100 max). People will spend them instantyl and on actually things they need. More satisfaction I think.
The log in, 1 win, 4 wins, 10 wins formula is quite good and lets every body get something according to time they can put in the game but I would bonus the 10th win as gift with better drop guarantee (there was no bigger rage than points for 10th win :) ).
Also with exp you should consider making GB1 a constant boost (during particular even not constantly for now) but with half of other room boost - e.g. - a day with +200% exp on select mode and the same time a constant GB1 +50/100 % bonus. It may be the half measure to let the SS stop complain with ability to play any modes during some days.
Also I'm very keen to see a day with no shared exp day once in a while. That would be interesting to experience :D
Above all thanks again for quite successful event (even maybe a bit to good) and hope you won't drop supporting this game for quite a while I hope
Cheers
wujekfresh