The first image shows only HBD -> HIVE conversions, and only above 1000 dollars. The image you reference is for total conversions, including HIVE -> HBD.

You have stopped your goal of stacking HBD right?

My reasoning for stopping the HBD weekly challenge wasn't the drop in APR. I ran out of HBD reserves and would have needed to sell HIVE to HBD to keep up with increasing amounts of HBD needed weekly. It didn't make sense logically, at this point in the market.

Instead, I now BUY Hive with HBD from author rewards, which is not the same as converting HBD to HIVE. Buying HIVE doesn't create more HIVE and helps support the price (well, I'm not a big buyer, but everything counts), while converting HBD to HIVE burns HBD and mints new HIVE, inflating its supply.