130%+ dividends❓ YieldsMax ETFs

[Alfonsoo]

I came across these ETFs that from what I understand are based on covered calls + bonds somehow producing up to 140% anual dividends. 
Some of the most popular are

MSTY

 https://www.yieldmaxetfs.com/our-etfs/msty/

ULTY 

https://www.yieldmaxetfs.com/our-etfs/ulty/

 

Now, honestly I don’t really understand how these work, but I have never seen anything like this. 130% dividends??? Naturally very high risk of course, but still… These have gained some traction in the crypto/dividends/Michael Saylor communities.

 

What are your thoughts?