this is just normal transactions, not "burning blockspace and bloating the UTXO set"

Interesting.

Found this answer in the twitter threads: https://twitter.com/vazertuche/status/1621709291471216640

Speculations, but still; might be it? More investigations probably incoming.

I'd ask Muun wallet ;)

A "spam filter" is a ridiculous statement. Nobody has the right to denote what garbage is on the BItcoin blockchain.

Fees go brrrrrr

The link for this post uses a read-only front-end for Twitter, which can be easier to read for viewing a full Twitter thread. The Tweet that kicked off the thread is:

While everyone's distracted by jpegs, something else is burning blockspace and bloating the UTXO set.

Over the past month, it may have used up to 2% of block capacity, created 0.4% of the current UTXO set, and fueled the recent spike in P2TR outputs.

https://mempool.space/block/000000000000000000037c8a7de1424deb85999b31928b8cea66f6f10374e600

https://twitter.com/mononautical/status/1621663167582437376 [Nitter]

For additional comments on this, see also another post found here on SN where the discovery was made that Muun submarine swaps are responsible:

Muun wallet is bloating the chain with submarine swaps #131428 https://twitter.com/mononautical/status/1621893734156623872 [Nitter]