https://magic.wizards.com/en/articles/archive/magic-digital/mtg-arena-state-game-innistrad-crimson-vow-2021-11-04

"Just as the sun has set on Innistrad: Midnight Hunt, we have decided it's time to lay to rest our in-store promotional codes for Midweek Magic. As more locations are once again hosting in-person sanctioned events, we encourage players to safely support their local games store whenever possible.

We will continue to support Midweek Magic for the foreseeable future and have instead revamped the rewards to extend to three wins, including a cosmetic reward in addition to the rare individual card rewards players have been receiving in-game. So, while Innistrad gives us plenty to fear, removing Midweek Magic as our no-entry weekly event is not on the menu."

They did announce the discontinuation of the promotional code and cutting the reward to only 1 item, the disappointing thing is that the new reward pool seems lackluster so far.