Add an invert option to remove a list which will allow filtering of input feeds to include specific users in a list

[SacRebel]

Users want to curate friendly/filtered feeds they can use as input to other feeds and then filter based on lists. At the moment you can only have a list as a remove filter for a feed using an input feed. Adding an invert would work on remove list blocks but so would other options....

[Invertex]

Taking a look at the code, I noticed that internally this actually exists as a feature, so you can actually do it.

Click "Switch to JSON Editor" right below the "Update Feed" button.
Change "type": "remove" to "type": "keep"

This will change it to keep all that are in that list.