POB was driven by great profitability. But peolpe kept complaining about any measure taken to increase the price of POB. I don't think there is anything we can do. The APR of POB is still pretty great, but nobody is buying POB while most are trying to take profits.

I'd advice you to go to splinterlands for profit and POB for the heart. :)
Splinterlands is currently the hive project, that pays the best.