0.2% can only go to those who were given a tumbler-code with a 50% discount, that is, the winners of various competitions that were held on this forum. For all, the minimum level is 0.4%.
Low fees, i.e. discounts up to 50%, not exclusively as a reward for forum users it is available to everyone under certain conditions. Additional discounts can be obtained depending on the total amount you mix through the service.
Here are the tables
https://tumbler.io/fee