I have noticed quite a few domains where there are no longer any paying advertisers for that keyword yet there is no indication that the domain has now gone back to generic portal. I only noticed this after examining large revenue decrease and checking keywords. Also, as wolfis says, revenue is getting pitiful at sedo now. Added 200 domains - revenue decreased 10%
Two suggestions for sedo:
1) When a keyword no longer has an advertiser please put a little red mark next to it so we can change it rather than losing money.
2) PLEASE PLEASE implement a daily overview - this has been mentioned a few times and would be a doddle to code. It's exactly the same as the monthly overview but just for the last 24 hours - this would allow us to identify earners on a daily basis.