What is MixPot?

Mixpot is like a reward for watching a stream on mixer if the broadcaster do that. This Was the case for the xbox briefing at e3.

You get free stuff for your xbox like items for sea of thieves or other games.

I love the mixer pot always great freebies

There is only a limited quantity of the rewards given away, so if you did watch the stream on Mixer with your Microsoft Account logged in. Then you might get the reward. They are automatically put on your account, the only way to see if you did get the
reward is by checking your purchase history on account.microsoft.com (comes up as code redeemed).

A MixPot is a bunch of free items you get for watching Xbox programs on Mixer with the account linked to your account, such as the recent E3 press conference and Inside Xbox. You have to be watching live to get the MixPot normally.

Xbox MixPot FAQ

During some of the Xbox Live streaming events on Mixer, we’ll be rewarding viewers by giving away MixPots, These MixPots will vary by event and can include different games and downloadable content (DLC) for each event.

Quantities are limited—only the first qualified viewers will receive the MixPot. Due to the popularity of MixPot, some viewers may not receive content. Viewers don’t have to watch the entire briefing to qualify. You’ll be notified after the stream is over
with more details regarding your MixPot.

How does the MixPot work?

Here’s how it works:

• Watch the Xbox Live stream on Mixer: You can watch the live streaming event using the Mixer app on Xbox One, any web browser at http://www.mixer.com/xbox,
  or the Mixer app on iOS or Android devices.
• Sign in to Mixer using your Microsoft account: You must be signed in to Mixer with your Microsoft account to get your MixPot.
• For existing Mixer accounts, link your Mixer account to your Microsoft account: To learn how to link your existing Mixer account to your Microsoft account (the account you use to sign in to Xbox Live), see Mixer
  account to your Microsoft account. Your account must be linked to receive the MixPot.
• Get your stuff! After the event, we’ll announce the games or DLC that will be coming your way as part of the MixPot.