Need to have some kind of ways to raise t!convert daily limits.
Why you ask? Well this is entirely optional for everyone but can be useful if anyone wants to buy things on a large scale if they have plenty of credits but not tradable ones.
300k is just an example, maybe some kind of measure to discourage botting/money laundering. Since economy might get overhauled for TM, I think raising limits can be a gateway for more players to spend more credits.