Great article @eosiosg! Note that the payment algorithm changed and the number of BPs that are paid is now based on whether they earn at least 100 tokens per day. It would be great if you’d update the article.
https://github.com/EOSIO/eos/blob/slim/contracts/eosio.system/producer_pay.cpp#L77
RE: System Contract Part #1 — Block Producer Rewards