Who is Bitcoin Core's largest contributor?
Chaincode Labs.
Balaji Srinivasan, co-founder of Palintir, and one of Citrea 's founders, funneled $500,000 through Chaincode Labs to spur development.
In return, Bitcoin Core has identified Citrea as the Schelling point for the removal of OPRETURN limits.
Who is behind Citrea?
People like Eric Wall aka Taproot Wizards. Jameson Lopp. Peter Thiel. Mike Novagratz (remember Luna?), Erik Vorhees, and a numerous cast of Bitcoin Maxis (JK, no Bitcoin Maxis here).
What does Citrea want to do?
Create an Ethereum Virtual Machine with Ethereum like smart contract using ZK rollups.
I'm glad Core is so committed to building on Bitcoin.