They use Bitcoin to embed 10,000 OPRETURN in a transaction

A new transaction on the Bitcoin network surprised the ecosystem by using more than 10,000 OP_RETURN outputs to embed an animation that will be permanently recorded in the network archive created by Satoshi Nakamoto.
It was an image that represented a character similar to a rabbit, called “labitbu.”

The transaction, which is included in block 909042, combined at least two entries, suggesting that funds from different sources covered their costs.
The hash f08fd61d48f79eeb0c4bc9e58f2d7ecad0e20e5d6411b588590cb0480c8e7fbe groups the more than 10,000 OPRETURN outputs, all at zero cost. The size of the operation was 268,690 vBytes, and the rate of 296,020 satoshis (BTC minimum unit) was $345.19.
OPRETURN is an opcode, or instruction, within the Bitcoin protocol that allows for including data, such as text or images, in transactions without assigning value in Bitcoin.
This practice, similar to cases previously reported by CryptoNoticias, shows an alternative use of the protocol, deviating from its original design as a system for transferring monetary value.
Instead, some users are using Bitcoin for inscriptions for artistic, recreational, or other purposes (or others), reaching up to 40% of Bitcoin’s total operations, which raises debates about its efficiency, purpose, and even triggering a client war in recent months.