When you click through via MyPoints to shop at a partner merchant, you send them tracking info that tells them that you came from MyPoints along with a piece of identification code that they pass back to us which allows us to match up your purchase with your member account.
Without that clickthru, not only do we not have tracking to match up your purchase, but MyPoints won't receive credit. MyPoints is paid by merchants for sending them sales. We split a portion of this commission with our members in the form of Points. If we are not credited for a member purchase, we do not get paid and therefore cannot award Points.