To hell with your personal ambition to underhandedly monetize other people's users.
EDIT: I changed my statement from 'monetize your users' to specify 'other users' as that more accurately reflects the impact of Mozilla's change. Third-party cookies are used for tracking users that aren't yours.
I'd love to see your ideas of a free and secure web without marketing money flowing into content provider websites.
Given Google's relationship with Mozilla, if this move would negatively impact Google, i would be very surprised to see it happen.
How is this in the interests of the end user is beyond me, really.
I'm curious how this change will effect services like optimizely that rely on third party cookies to prevent tests being run on the same users multiple times.
Big deal.