As an addendum, I don't think of it so much as less people willing to post chords, as there are are less people able to post chords then lyrics. It is usually much easier to find lyrics to a song in a search then the chords. Then when you add in the additional difficulties of posting them.

Several of the abc conversion programs have a feature that will suggest chords, however, so for those seeking chords it might be worth looking into that aspect. ABC's of many tunes are almost as easy to find as the lyrics, and they are also easier then the chords to post.