Yea, I think 50 is a bit much, 20 is a much more reasonable number....
Says the man with 21 posts. 
It's kinda funny. I've noticed that since the limit has been implemented the quality of my posts has decreased substantially and the frequency of said posts has increased. This can't be a good thing for the quality of the community.
This is only natural. To engage in meaningful discussion, you must now first engage in meaningless discussion. Any occasion to chime in is of priority now; before, you would speak when you felt it appropriate. Before this rule, I wouldn't engage in mindless banter or throwing in some funny posts or commenting on less-than significant aspects of a topic, but to get to the meat and potatoes of this forum, you gotta muddle through this shit.