There are several users who have made many smaller games I've enjoyed, and while I've bought a few of their games I would like to add many more, but I am reluctant to spend more than a few dollars per game and I am always a little afraid of my credit card being locked for  making too many small transactions. If sellers could create permanent bundles of their older or "pay what you want" games it'd make purchases musch easier to buy many of a creator's games at once for a larger lump sum.

If the ability for users to sell in any currency is what prevents Itchio from having a cart system this could be the closest alternative.