What happened
Justin Gaethje announced "my official partnership" with Rainbet in an Instagram post published on 20 July 2026. The accompanying 14-second video shows him training in a black Rainbet shirt. He says something is coming and that he cannot wait to show viewers. Rainbet's logo appears on his shirt and again at the end of the clip.
The announcement followed an official UFC on Paramount+ clip published on 19 July. It shows Gaethje in the crowd in the same Rainbet shirt. The broadcast lower-third identifies him as "UFC Lightweight Champion" and "Former UFC BMF Champion", while the account's post calls him "the lightweight champ."
This is a visible sponsor change. On 29 January, Gaethje's official X account posted "Justin Gaethje x Duelbits" and said he was "proudly backed" by Duelbits. None of the available posts explains when that arrangement ended or whether the Rainbet deal is exclusive.
The new material confirms a commercial partnership but not its terms. Gaethje's caption does not disclose the contract length, payment, campaign schedule or geographic scope. It also does not use the word "ambassador", so this report describes the relationship using his wording: an official partnership.
For Rainbet, the placement puts its name in front of MMA audiences through a current UFC champion. For players, the endorsement does not verify withdrawal speed, bonus terms, licensing coverage or availability in a particular country. Those checks still need to be made against the operator's current terms and account interface.
What the sources confirm
- Gaethje's official Instagram post on 20 July 2026 calls the Rainbet relationship an official partnership.
- The announcement video shows Gaethje wearing a Rainbet shirt and ends with the operator's logo.
- UFC on Paramount+'s official X clip on 19 July shows Gaethje in the crowd wearing the same shirt, with a lower-third identifying him as UFC Lightweight Champion.
- Gaethje's official X account announced a Duelbits relationship on 29 January 2026; the public posts reviewed do not explain the transition between the two brands.
What a player should check
- Confirm that Rainbet is available and legal where you live before opening an account.
- Read the current bonus, wagering, verification and withdrawal terms inside the official site.
- Treat a fighter endorsement as marketing, not as evidence that a casino is suitable for you.
- Set deposit and loss limits before using any gambling product.
Sources
Links below lead to the material used for this report.
