There must have been some reason behind your recent, unannounced changes.
Let's check the database:

What is the 'Steam Transaction Fee'?
The Steam Transaction Fee is collected by Steam and is used to protect against nominal fraud incidents and cover the cost of developing this and future Steam economy features. The fee is currently 5% (with a minimum fee of $0.01). This fee may be increased or decreased in the future."

I don't remember when this was introduced; it's been over ten years already. All rules become obsolete because the rules of the game change. Your market has changed over the years.
The creators of the original rule focused only on the US currency. But over the years, dozens of other currencies have been added.
The community market has shifted to cross-currency transactions. Your US dollar is too strong, but you didn't divide it in the US. And when the strong currency rule was applied to weak currencies, December 5th happened. Billions of virtual goods on the marketplace are now oriented not toward strong currencies, but toward weaker ones.
There are bad and very bad solutions to this situation. My proposal is very simple: reduce the minimum sales fee from $0.01 by orders of magnitude. To $0.001, $0.0001, $0.00001, and so on. Choose some fractional value of a US cent and apply it to other currencies as a base. Because billions of virtual goods are now worth much less than $0.01, and this issue has been unresolved for many years.
If you have any problems, you can't blame all the problems on consumers, because that's a bad solution in a civilized society. Changes to the marketplace for dozens of currencies are greeted with obscene language, and there are reasons for that. Increasing the fee several times is not a normal solution, and it won't be understood. But you can fix this with a fairly reasonable solution