CPM for a job site must be something really nice, at least $5. Perhaps they have around 50M pageviews per month, so that would make $250,000 / month. Maybe valuation should be about $15M? Indeed got $5M in funding, so that seems fine. Simplyhired got $17M, that does seem on the high side.
6-9 million uniques isn't really worth the funding any of them received, I don't think.
They didn't ask permission for the data any more than Google did. Scrape/index/refresh/repeat.