This milestone is made, particularly to encourage people like you. We have a reasonable amount of long term members who prefer to stay away from discussion but are regular visitors. They will now be motivated to reach that 140 mark to get this milestone unlocked and earn the bonus 100 points.
I was not posting messages in ddf for 9 days because internet was banned in assam.
After 9 days when I came online then awarded 15 trophies. For what! i was in puzzle. I thought I awrded for not posting 9days. But finally understood that it is for compliting 500 messages