I guess this is due to EA shutting down the game. The diamond vaults available in build mode have been reduced in price from 1 – 4 diamonds. These things produce a certain number of diamonds an hour. Number of diamonds varies on the vault you purchased. To purchase one, you have to have diamonds in your account. If not, you’re out of luck as you can no longer purchase diamonds. So if you do, get however many you can and collect a ton of diamonds to complete both maps and unlock everything whilst you still can! w00t! And another tip from Judson, if like me and you ONLY have 1 diamond. Buy the first one and once it produces diamonds, buy the next and so on and so on. Then you’ll have unlimited diamonds. w00t!

Thanks to SP founder Jud for the tip!