My mistake.  Initially, I went by the "last active" date that is shown in the BPIP search as April 21, 2016.

https://bpip.org/search.aspx?q=gavin

However, I see from the forum profile, it shows that he did log into the forum on October 11, as you mentioned.  I think that my point does still stand though because login in and not posting is likely NOT going to achieve much BPIP recognition, unless he is sending PMs through the forum, and I am not even sure if that would help much, unless he were to be gaining merits through such PMs (which would be a strange set of events, no?).