Unfortunate.

Revising my review.

The lack of in-App purchase and not being able to use Apple Cards is indeed a hassle. However, its minor in the scheme of things.

The importance is that you have all many comics in a convenient place for travelling, etc.

Customer service is stellar - quickly solving an issue I had.

As a long time user of this App with close to 700 comics, I recommend it.

LFD about Comixology - Comics & Manga, v3.6.5