Looking at the CPU miners of BiblePay (BBP) in mid-September 2019 to mid-October 2019, about 8 solo miners made up more than a third of all blocks that were mined on the BiblePay network.
As you can see from the chart below, we are looking at a count of mined blocks per day (UTC) starting from Sep 16 to Oct 20, 2019.
Miner B5Us clocks in the most blocks at 478. Close second is B96CB at 468.
You can see on Oct 13 (when the external miner was released), BHkiv and BNNcw both mined just a few blocks. B5us, B95C, BSk2, and BLEN all took the lion’s share of blocks on 10/13, 10/14, and 10/15. After the weekend, the top solo miner’s block count all dropped as other external solo miners came online.