If BR had lower prices, how many more pics would they have sold? Seems like their profit would be better with lower prices and more sales. And the hard work has already been done (pics are taken, and sorted, regardless).
Lower prices may bring more sales, but the profit margin from each sale becomes smaller. So, for example, if Brightroom wants to make $100 and now they need to sell 5 prints, they may have to sell 8 prints to reach the same goal with lower prices.

Also, posting pics isn't the end of hard work. Once I get orders, I retouch those ordered images, which takes some time. Virtually no single image goes to the printer straight out of camera. I always look for any improvements in images so my customers will be 100% satisfied.

Disclaimer: Like I said in my previous post, I am speaking only for my own business, not for Brightroom or any others.