I'll admit to being bingo addicted. Great part is in my main account I've gotten 4 new dragons (crafted from golden tickets), plus being prompted to breed 2 specific dragons together has given me a handful of new dragons (like most of the Olympus hybrids I'd never tried to breed for previously).
This last week in bingo I got 4 of my DS accounts to be 1st or 2nd in gold league (a bit tiring having 4 accounts in gold league!). I used an average of 150 gold per account in the week (mainly for the boosted points, sometimes to speed breeding). It's worth it to me since I'd pay ~600 gold for a GPD, and thru 4 rounds of winning 1st/2nd place I could spend 150 gold a round and still come out the same. More work, sure. But I enjoy the process personally. I LOVE the food boosts of 10X faster crops. I feel like a combination of food boosts and egg boosts helped me finish the last world event. I realize bingo may not be for everyone, but I'm glad it's there. Once my "lesser" accounts hits the 200 ticket mark I doubt I'll continue bingo there - but on my main account I will... if nothing else, for the food boosts!