You may right but i m unaware of that!
I cant read minds and cant go inside hearts of the people.
my invitation may be wrong for this guy or not, his contribution will decide.
Some time ago i invited a guy with a high qualification but he failed to contribute.
I dont know why people do that! Why they just come to collect not to share?
any way if any user fails to contribut in the forum i think adms should delete his
account after 1 year.
Dear friend I had also done same mistake in past..
EDIT : Language modification