My experience with BB was not good. The mgmt is substandard, they are overly aggressive and they market the hell out of everything. I do not trust their numbers, it's my gut feeling and I have nothing to back this up but everything at Blackboard seems shady to me - this leads me to believe that things stem from the top and it's bad. Also, I am hearing they are having layoffs right now.
I left in 2017 on my own.
Best of luck!