There are a few trade run plugins that are free and public, they work well enough, a bit buggy still. I would recommend a 3 day trial and just use it in short bursts until further developement. But still I just use it for trade runs ATM.
It is true though greedy people think their plugins are worth more then the bot itself (which is ironic because without the bot they wouldn't have a plugin to sell). But in time the plugins will be bought and put out to public consumption and the bot will be developed further it will be another great buddy product.