The restrictions on iOS content blockers mean that it's not possible to add value, it's just basic competence to apply pre-existing filter lists maintained by someone else.
Gorhill's browser extensions are great, have actual features. This isn't possible in iOS.
One of the nice things for developers working in the Apple ecosystem is that users are willing to support well crafted software.
Although, sometimes you do run into developers as selfless as Gorhill who still craft excellent software.