Someone suggested (not a Hive proposal) for a 50/50 revenue share. Half would be put to Hive and the other would be shared to all with Staked Hives, depending on how much you've staked.
Hive could make an account (ex. @hiveads) for Ads to receive payments. Payment could be upfront or periodic with credit card, advertisers pay/buy Hive and every X number of days @hiveads will calculate the shares for all Hive accounts with regards to there HP.
Tell me if I have understood your question, or not.
RE: I believe it is a good idea to create a dedicated advertising platform like AdSe ...