I thought that it had always been 0.1 ETH for the payout threshold even before the implementation of EIP-1559.
This is true.
Correct me if I’m wrong, but my understanding is that transfers OUT of the Polygon L2 network still has fees and some exchanges does not allow you to sell ETH to a fiat currency directly from Polygon.
(Different countries may have different exchanges with different rules.)
Since the implementation of EIP-1559, I’ve seen that the rate of ETH earnings fall around 28% (initially) and about 50% between the day before the implementation of EIP-1559 'til now. (I used to be able to hit the 0.1 ETH automatic payout threshold weekly, and now it’s about every 10-14 days, and with the change to 0.2 ETH automatic payout threshold, the automatic payout will happen approximately once every month.)