The confusion is the difference between this year (2019) and next year (2020). (and that we use 6months in several different ways)
This year: All comics are released digitally for free on League of Legend's Universe page. They are also simultaneously sold as a premier edition with bonus content - released on Comixology's and Marvel's readers. (The premier edition also takes advantage on Marvel and Comixology panel zoom functions, page structure, collection structure, etc...).
Then 6 months after the digital comics are released marvel will release a physical collection, combining all of the previous issues into one book that will be for sale at local shops, amazon, etc. (Aka a Trade Paperback.)
BUT...
Starting in 2020:
The books are sold as physical, floppy comic-books in stores, on Marvel reader, and on Comixology.
Then 6 months later, only when we are selling the Trade Paperbacks will the comics go up for free on League of Legend's Universe's website.
Make sense now?