Like Lite said:
"Maybe something like, 100 + X% where X is the amount of consecutive days you are playing with a limit of 100 and you only get it once you win Y ranked matches"
This could also work, and maybe after a certain amount of logins and ranked matches, you get some sort of a spin of a wheel (since we cant get off the topic) There is only one highly valuable thing on the wheel, but it is like a 0.001 percent chance to get. There could also be a entry fee for the thing, like maybe 100 tc for a bad spin roll, 1k for an ok roll, 10k for a pretty good roll, and 100k for a great roll. Maybe this could be a new aspect of like a gamble for the toribash community.