Scammer is in the Theta_network discord, and sending DMs that look like [this](https://i.imgur.com/g1lOpDF.png). After a quick google search (since I wasn't going to attempt to do this myself), it seems the idea behind the scam is that when you go to "redeem your prize" you have to put in about 0.01 btc before you can "redeem" it (which you can't).
As always, be VERY cautious any time you get a DM, especially when it seems too good to be true.
EDIT: you can disable all DMs from discord server members by clicking the dropdown next to the server name -> privacy settings -> unchecking the box
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