There are several ways:

1) Hold over 10K, 25K or 50K GMC tokens for longer than 30 days to get cashback increase bonus equaling 5%, 10% and 20% respectively, also with every step you increase your base cashback rate as follows: 0.05%, 0.075% and 0.1% of amount spent.

2) You can gain additional 0.05% to 0.1% cashback boost with all of your online and offline purchases by tying up your Smart Wallet to a cryptocurrency (e.g. bitcoin, ether etc.).

3) You can join Back4Cash program and get another cashback boost of 5%, 10% and 20% for owning over 10K, 25K or 50K GMC tokens for longer than 30 days. This one is only valid until token sale is over. Additionally users participated in this particular promotion will afterwards receive Crypto Cashback payouts pegged to the value of a GMC token at the time of the Token Sale, although above condition may change in the future.

Total max cashback can reach as much as 45% with exclusive promotions from merchants affiliated with Back4Cash system.