Does anybody know why there were a bunch of 546 sat UTXOs being created as early as 2019? I knew of the more recent spike due to BRC-20 but didn't realize how early on 546 sats would become the most common (mode) UTXO value. 
Discussion
Dust attacks?
Most likely...I don't remember specifically hearing about those though.
Idk. Awesome chart. Wish I understood Bitcoin back then.
Looks like it might have something to do with Omni Layer...gonna look more into this at some point.
Also some will be BIP47 notification transactions
Yeah, I was going to guess some scheme like that, or RGB.