RTB bidders are actually throtled based on the amount of traffic they purchase.
For example, if you win on average 100% of the time, you will get to see 100% of the traffic (for example, third-parties can see 100% of YouTube views, know which IP block has seen what videos, etc).
However, if you win on average 1% of the time, you may get only 1% of the requests.
Usually it's proportional to the amount you buy, to prevent such passive data collection.
Isn't the point of providing the data to give bidders a reason to bid (no point in bidding outside their market)? If so, that would give all data to any bidder, as claimed above.
Regarding proportionality, don't they always get the info of the bids they win? If so, what you're saying is that you only get the info of bids won.
RTB bidders are actually throtled based on the amount of traffic they purchase.
For example, if you win on average 100% of the time, you will get to see 100% of the traffic (for example, third-parties can see 100% of YouTube views, know which IP block has seen what videos, etc).
However, if you win on average 1% of the time, you may get only 1% of the requests.
Usually it's proportional to the amount you buy, to prevent such passive data collection.