The only change I would advocate for is to make it opt-in (perhaps using just the name of the job for those who don't opt-in), but it absolutely should NOT be taken down. Either a different site will pop up like people said, or you lose anyone with interest in their DPS numbers, which will be a very sizeable chunk of the playerbase. Would FFXIV survive that? Probably, but that's still a huge wad of cash SE are losing. So it's not in their business interests to take down the site.