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Hello again! There are a few layers of things going on here, so I'll try to break it down as completely as I can. The number of links reported in the 'Internal Links' column is coming directly from our index rather than the live crawl performed by the Crawl Test. So, any pages that we haven't indexed would display 0 internal links and a Page Authority of 1. For the pages that we have indexed, we tabulate internal links from all pages on your site that we view, but those pages are not necessarily indexed. This means that the large difference that you're seeing between your site and your competitors' internal link count could be simply coming from the fact that we've seen (and potentially indexed) more pages from your site than your competitors. This could happen more readily if we indexed inbound links that pointed to a wider variety of pages on your site, and also the overall size of your site. Also, it is always worth noting that this is just a snapshot based on your highly-authoritative backlinks, so it is not necessarily able to serve as a complete indicator of your (or your competitors') total link counts; these are just what we've observed during our particular indexing process. As far as the SEO implications of these counts, while I'm certainly no expert, I don't believe that large numbers of internal links like this would have any sort of direct negative affect on your rankings. I hope this helps to explain!