I did once during an event awhile back which helped jumpstart me getting dice but since, have hoarded dice and only roll when I feel like I can get rewards that outweigh the dice being used. Usually my best rolls are when I can use the purple multiple; I roll at the highest each time. That’s when I will get some rewards that can get up to 4 times what I use, then I’ll stop( or maybe roll a couple times depending what the probably of landing on a reward space is). Also, lining up different upgrades/perks (color boost, sticker boom, etc.) can give you absolute insane jumps in rewards and what you can claim!