No worries. Fullcontact API is not really use friendly compare to stacklead and clearbit (old apihub).
I ran some test on the 3 of them and Stacklead was the one that could usually found the most useful information. Haven't tried Clearbit in the last 2 months though...
Thanks for the recommendation Sylvain! Yes, we've been busy improving our data over the last month. Give it another shot - I think you'll be pleasantly surprised.