Red Bull to Pull Out as Tech3 Main Sponsor?

Apparently, they are looking to pull out even though they are contracted for the 2021 season as well.

Seems a bit odd given that Oliveira took that fantastic win and the history that Red Bull/KTM have...

https://www.gpone.com/en/2020/09/23...utm_campaign=social&__twitter_impression=true

I would not be surprised to see more sponsors drop... Over the last week a number of major sponsors have pulled out of Supercross teams in the USA, Yamaha may pull out all together, this is all a result of covid related issues.

Question: What happens to those riders contracts? I am sure they are in part linked to sponsorship money.