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Hi Yoav, I doubt this impacts your SEO as long as it isn't being seen as manipulative. I doubt that though, since the set-up is very transparent. If you want to exclude URL.com as a referrer, check out this guide.

Then you probably have to give it time. Here is a link of google support for crawl time. http://support.google.com/webmasters/bin/answer.py?hl=en&answer=34439

Joram and Adam are essentially correct. MozRank is built to emulate PageRank, and so it does take into account the MR of the incoming links, not just the total count. It is in essence, though, a measure of quantity - just a complex one. Links from sites with more links count more, so that's a quality signal, in an abstract way, but we don't take into account the relevance of the links or spam factors. Domain Authority is much more complex and is a machine-learning model based on observed Google rankings. Essentially, it's an attempt to predict the ranking power of a site.