If you want the "exclusive" experience—meaning high-quality, bonus content, and supporting the author—here are the actual methods to get the audiobook for free (or nearly free) using promotional partnerships.
If you encounter a site claiming to offer "TBATE audiobook free exclusive," verify the source: tbate audiobook free exclusive
The search term refers to The Beginning After The End, a popular web novel and comic series. The official audiobook is a paid product. While free methods exist (trials or unauthorized uploads), the term "exclusive" likely refers to the official web novel chapters which are currently ahead of the published audiobooks, or the exclusive content offered on the author's official app. Webtoon: The comic adaptation is free to read