The 2018 OWL All-Access Pass was an limited-time campaign item that gave you Twitch badges/emotes and Overwatch in-game items.

It was for sale for between $14.99 and $29.99, depending on when you purchased it.

https://www.ign.com/articles/2018/04/05/overwatch-league-all-access-pass-includes-twitch-emotes-in-game-skins-and-more-for-30

https://us.forums.blizzard.com/en/overwatch/t/the-2018-twitch-overwatch-league-all-access-pass-is-now-on-sale-for-14-99-usd/252275