Flat fees will become more affordable bit by bit.

费率逐渐变得更加低廉。

youdao

Fees are charged at a flat rate, rather than on a percentage basis.

费用按固定的费率收取，不是按百分比。

《柯林斯英汉双解大词典》

Since getting the flat, he’d refused to work. He even asked his parents to pay his utilities and his own son’s tuition fees.

因为得到公寓后，这个儿子就拒绝再去工作了，甚至他还要求他的父母来付物业费和他亲生儿子的辅导费。

youdao

Flat fees with no extra telephony charge is the norm in most of North America.

CNN: Cell phones aren't just for gabbing

Which is too bad for them, for though companies may moan, consumers love flat fees.

ECONOMIST: Internet service providers

On top of this, the Korean and (even more so) Russian lawyers were charging flat fees, not hourly rates.

FORBES: Patience Required As Chinese Companies Go Overseas