Cloudflare is listed as a Platinum sponsor on the Ladybird website (https://ladybird.org). Also from their website:

What are the sponsor tiers?

Platinum USD $100,000

Gold USD $50,000

Silver USD $10,000

Bronze USD $5,000

Copper USD $1,000 (no logo, text only)

Sponsorships run for one year, then you are welcome to renew.