go.adcore.com
I'm here to answer any questions you may have.
I think you should define SEM on the front page - acronymns are fine if there is a clear definition available (unless you are aiming only for people who will know that term well).
You Pro price seems quite steep for a SAAS product. $15 per campaign per month is a high marginal cost when all you are offering over the free version is email support. If I was using your product and liked it I would be tempted to create multiple free accounts rather than upgrade to premium.