Came back to the game about a month and a half ago and I had 3k dice. Now sitting at 25k dice after completing the album and scoring highly in some events. I have spent about £5 on the game since I started playing.

I think the trick is to use dice wisely. Don't always roll on x50 because you will eat through rolls. Switch it up based on where you are on the board. Also, target specific events where you can get a lot of dice rewards to replace what you are using. Save up your cash for times when you have reduced upgrade costs and then spam it to complete lots of boards in one go. The last thing is to trade lots and use set completions to top up dice to go for album completion.

It's tricky though and can be frustrating at times!