User blog comment:Mitteh71/Crystal Production/@comment-5200570-20121012224947

I don't hate the temporary crystal producers like many do, I've bought at least one of every one, except the crystal star. I am on ios too so yes obtaining crystals can be difficult. I wish when I started the game I had known how valuable they would be later on and not purchased some of the stupid things I did.

I did spend $12 during a crystal sale once to get a crystal bank and a crystal tree (During their final release) and I'm glad I did. Through careful saving I've been able to work my way up to 7 crystal producers (A bank, tree, pyramid, rose, mansion, and two alchemy stores) so I'm making around 10 crystals a day now. With the temporary producers I'm not looking to double my crystals like they advertize, but I know I can easily make 30% - 50% more crystals than I invested so I consider that an interest rate worth investing in.

I too am hoping for the return of the crystals for dinos sale, I wasn't able to take advantage of it when it first came around because I didn't have and double dinos that were adults. I'm prepared now though if it ever comes back, I'll easily be able to pull in 1000+ crystals, I'd even be happy if it came back at half of last times payouts.