Boost NFT cards

Each NFT card can be boosted up to 5 times to improve Earning attribute. Each boosting will cost 200 NEXT to improve earnings by 2 units and must be 48hr apart.

To boost	Boosting Cost (NEXT)	Earning increase	Time from last update
1	200	2	48hr
2	200	2	48hr
3	200	2	48hr
4	200	2	48hr
5	200	2	48hr

Your original NFT card earning will affect the reward percentage increment after each boosting. The rule of thumb is that the higher earning, the lesser increments as you're already earning a lot with this high earning NFT card.