They do it for personal marketing reasons. Someone else could have posted a PoC soon after and stole some of their spotlight. I agree, it would be nice to wait

They do it for personal marketing reasons. Someone else could have posted a PoC soon after and stole some of their spotlight. I agree, it would be nice to wait a little while for people to get their patches installed. But also, people like to have a way to verify that the patch worked.