Volcana, I noticed the same fall-off in poster interest as you did. Last week I started a topic about Anna's surprising (to me) decline in doubles, wondering about it, and it got VERY few replies. No one really cared, I guess.
On the tennis court, imo, Anna has been irrelevant for years now, in the sense that no one (least of all, the players themselves) expects her to do any damage in a draw of top players, as they may have anticipated 5 years ago.
But I guess the fall-off in poster interest is natural, as the player in question has not given anyone much room for hope of a return to contender-status in years. And Hope is a really important component of being a sports fan.