A very welcome move because for years Cloudflare has freeloaded certs from Let's Encrypt without sponsoring Let's Encrypt finacially. Though Cloudflare has contributed in otherwise to the ecosystem like by running CT logs etc.

Now, it looks like WebPKI is going to fracture into two regarding PQ Crypto. With Google (GTS and Chrome), Cloudflare and Let's Encrypt all preferring MTC and legacy CA's like Digicert, Sectigo, Globalsign all heading towards non MTC.

If Cloudflare would not have decied to become a PQ CA for MTC. We would have a duopoly with GTS and Let's Encrypt. This is a worse off situation. Therefore I welcome Cloudflare CA for MTC.

Also, its not like they are going to make any money of the CA business if they are going to issue DV certs for free. It will reduce the pressure on Let's Encrypt from carrying the burden of securing 60% of the world's webistes.