Just thinking about how I would detect these... I could look for sendmany transactions that have known addresses in them. Maybe the donation address is enough?
The donation address appears not to be included in subsidy payments. So I don't have a consistent way to identify subsidy payments unless someone can provide me one or more addresses that have consistently been mining with a reasonably high hashrate (and therefore has received every subsidy sent in the past) and will continue to be consistently mining with a high hashrate (and will therefore receive every subsidy sent in the future).
I can identify the subsidy payments that
I have received, but I know that some payments happened before I switched to p2pool. And my hashrate is just above the cutoff where if the pool grows much more, I may not receive every payment in the future (because my share would be below 0.01 of the total payment).
The only other thing I can do is maintain a list by hand. It could still appear on the website, but someone would have to tell me every time a subsidy was sent and I'd have to manually add it to the list.
So...