Comment posted to Yoast WordPress SEO Plugin Review by WordPress SEO Theme Author.
Google’s never limited the number of links it will follow from a page to 100.
There used to be a 100KB indexing limit, where Google would only index the first 100KB (code wise) of a page, but it dropped that limitation years ago.
Google and many SEO’s advise trying to limit the number of links from a page to under 100, but it’s an SEO guideline (an arbitrary one at that), not a limit per se (Googlebot will spider more than 100 links from a page: have tested this).
When the Googlebot hits a page it randomly follows links from the page, if you have 100 links there’s a 1 in 100 chance of any one link being followed. Googlebot doesn’t limit itself to following only one link per visit, but for the sake of ease of understanding if it did, the Googlebot would find it extremely difficult to follow all 100 links from a page over a reasonable period of time.
The SEO argument is by limiting the number of links from a page to below 100 the probability of links not being followed and their respective pages spidered by Googlebot is significantly reduced.
I’ve never deliberately limited the number of links from a page to below 100, add as many links as are needed, and have tested a links page with over 1,000 links where I added pages not linked from anywhere else and they were eventually spidered from that page (took a while mind you).
Basically if you have sites with a lot of Categories (Tags in your case 
) for example because many of your pages have those links, the probability of some being missed is very low.
There is also the argument of how many links a particular page can support and what you are trying to achieve SEO wise.
If you have a page (Page A) with one backlink to it from a page (Page B) without any good backlinks to it, Page A would not be a good choice for a links page with 200+ links to pages you wanted indexing fast. Page A won’t be visited very often and some of the 200 links might not be spidered from that page for months/years.
So on a site with hardly any backlinks it’s going to struggle with pages with a lot of links, but a site with a lot of backlinks can handle pages with a lot of links from the pages.
With regards hiding affiliate links, I’ll drop you an email with a link to one of my test sites using WPRobot, every nofollow link is hidden via a combination of hacking the WPRobot module files and an edited version of my Talian theme. Been meaning to try to find the time to achieve similar without having to resort to hacking the modules (make it a theme feature, have a lot of customers who autoblog), but I’ve gone as far as replacing the links the eBay module creates (that are served by eBay) so there are NO nofollow links and no links a search engine spider can follow from the thin content. The added benefit of this is it hides the thin affiliate footprint, search engine bots don’t see links to Amazon etc…
Since Google deletes the link benefit that would have gone through a nofollow link I’d never use them on an internal link (linking to Categories for example). You could argue as you don’t really want to send an affiliate link, link benefit (helps them rank better than you) even though nofollow deletes link benefit, as you don’t want to send it to an affiliate that can compete with you, delete it (that’s why I hide the affiliate links rather than nofollow or dofollow them).
David
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