At the risk of putting my head far enough above the parapet to have it shot off....the dearth of Tops is sort of understandable on a board where the main idea is building relationships and living a lifestyle as opposed to being sexually dominant in a bit more of a BDSM sort of way. i know of other boards where tops post a lot. But in none of them is the conversation about the sensitive and personal issues we talk about here a lot of the time.
In other places, the Tops make fun of bottoms, rib them gently about spanking them, or even seem to be rubbing their hands and drooling over buzz words like "spank you on your bare bottom" (drool). I find it a little repulsive at times. The majority of our Tops have a deep and caring need to learn the complexities of how to give bottoms what they need - which is a complex process and requires a more thoughtful nature than the ability to be a lecherous bottom fancier.
There's also a tendency in some other places to leave the bottoms to play around to the point of brattishness. Once a bottom says something a bit risky, the Tops pop up with empty threats of spankings etc. it's all a game. here the 'game' is getting to know ourselves and learning to make it work for us all. The whole emphasis is different and most of the Tops are watching and learning and considering.
Cynical? Maybe. But I've been around a lot of forums over the years!
On the other hand it could just be that bottoms talk a lot!