I calculated all the alpha bay sales today. 5,000,000 of total sales of drugs and products listed. (round figure) Hence 5,000,000 * 0.05 = $ 250,000 Annually.
This figure might be on the lower end a little bit, cause maybe there are other revenue streams like featured listings and stuff.
[EDIT] All listings on alpha bay says the number of items sold since %date%and then ofcource the price of the listing. thats how I came up with $5,000,000 of total transactions 0.05 % alpha bays cut on each transaction.
For example http://pwoah7foa6au2pul.onion/listing.php?id=118324 this listing has sold 1822 items since Mar 15 2016, and each item costs USD 8.96 hence the vendor has made 1822 * 8.96 = USD 16325 and alpha bay has made 0.05 * 16325 = USD 816.
What are your thoughts?
since we're just pulling numbers out of thin air I'm going to estimate that they are making $500,000 annually. I don't have a formula like yourself, but I like that number and it too, is round