Question SEO toolkit limit on keyword tracking per server?

[ivapix]

Before i decide to buy extension I have some doubt about the limit of keywords which can be tracked. Seems like on Agency plan there is limit of 2000 keywords per server. This limit for me is really low, especialy if you divide that on 40 websites that is 50 keywords per site. We can say that tracking 50 keywords per site is ok but then we have a second problem and that is our server is than limited on 40 sites only! Third problem which i can notice or maybe i am wrong is that our hosting clients can add unlimited number of keywords to track and we can not limit them so basically one site can occupy all 2000 words!

Please someone correct me if i am wrong, as i would gladly like to provide SEO toolkit to mine hosting clients.