You can still customize it, but it has hard minimum at what I think is $7. The old humble had no minimum at all. They also deceptively set the “default” cost 1 tier above the actual “get all the items” cost for bundles. A very irritating and obvious dark pattern.
Just IGN brutalizing a beloved name in gaming via enshittification to make its money back.
Instead of speculating I just tried and the minimum you can go on the bundle above is 3,75 EUR.
Apparently the minimum to Humble is generally between 15% and 30%
This bundle had no minimum to the publisher but some bundles apparently do.