I see your questions and I provide you with direct answers.
1NastyFRkeUTmMdbMmzggDVTQA6r3ibUoX is current donation address. A receive amount of 481.52392888 BTC is known.
1EwtTKJaXAtctSFqCQKU3LiCg9dqYPEkxN is old donation address. A receive amount of 166.14740086 BTC is known.
Together is 647.67132974 BTC.
nastyfans receives donations in other ways. As example there is part of NastyShop sales for some items. As another example I donate all distribution transaction fees since June 2016.
Therefore actual total receive amount is 732.76935760 BTC. You can view this on "donations" page when you sign in.
In beginning was 25,000 seats. Later we vote to add 5,000 seats. And some seats do not receive donations. nastyfans currently donates 25% of donations to NastyMining. In past it was 0% and 50%. nastyfans voted for these changes and OgNasty abstained from these votes. Therefore amount per seat per distribution is various over time.
For a seat receiving donations for every distribution from beginning there is 0.04307375 BTC paid to now.
Online seats use any payout address owner wants. Usually this is not a 1Nasty address. When seats hit payout threshold of 0.0005 BTC then they receive payout. Usually every distribution has some seat that hit threshold.
When you sign in you see current holding amount for your seats. For your online seats and your minted seats.
Correct.
I hope it is clear for you. Online seats usually do not use 1Nasty addresses. I do not take any profits or special payments from nastyfans. I own online and minted seats like all other fans.
When you sign in there is much information about history of donation distributions. History of payouts to you. History of all distributions. For each distribution you can view details of where Bitcoin is sent.
The analyzer is not run by nastyfans. It is a third party server. I do not know if it is current with statistics.