There's probably 30 or so people on my friends list (or were on my list, I've deleted some that haven't played for weeks) that have taken the same approach as the OP (or quit entirely), which has made it more difficult for me to collect enough eggs to get more prizes.
But these wheel of chance/randomized prize events are just maddening. It wouldn't be so bad if so many of the prizes weren't so useless that it just feels like a kick to the groin when you collect an egg pile after hours of bunny zapping and egg exchanging.
At least get rid of the decorations that serve no purpose after hitting it once. One pond, one gate, one egg pile. That's fine. Hit them once, replace them with 250 pink or blue eggs or donuts. Remember when events used to reward us with donuts if we finished early/succeeded?
I enjoyed Whacking Day's prize reward method (not necessarily the collection method) where you just had a running tally and you got prizes as you hit milestones. At least you knew you would get the prize. This is just a cheap stunt to drive you to buying donuts. Not going to work on me. Not a chance. In fact, I'm far less likely now to buy donuts than I ever was.
And it's not like EA didn't see this coming. You can bet they included the donut bonus for 50 fences because they knew people were going to be irate about collecting so many decorations and getting nothing for it.