The "revisit-after" tag has absolutely no value in HTML nor SEO. At no point of time did this tag ever have any value. There was a single search engine which was never of any significance which created this tag, but it was never adopted by Google nor anyone else.

If anyone disagrees, then I would suggest they add the following meta tag to their page:

It is no more effective then the "revisit-after" tag but at least it's original!

http://code.google.com/webstats/2005-12/metadata.html

What we know is there have been many cases where a page that is blocked in robots.txt has appeared in search results. The explanation provided is that robots.txt blocks crawlers during normal site visits, but not necessarily on visits where they are following links from other sites.

Daylan offered a great answer but I would like to add one exception. When crawlers from the major SEs visit your site they will honor your robots.txt file but sometimes they will follow links from other sites to an article on your site, and during that particular visit they will not see the robots.txt file and index your page.

This is one of the reasons why your robots.txt file should be used as minimally as possible, and when it is used you should have a backup process in place such as the canonical or noindex tag on a page.

Joshua,

My goal was to respond to your question and bring issues to your attention. I apologize if the reply seemed harsh.

When I view your site, I like the content, the images and the idea behind the site. I see you filling a popular niche very well. The biggest concern I have, which could potentially cause a bounce in SERPs, is your anchor text.

I cannot say with certainty this is the root cause of your issue. I can say it is a big concern to me which relates to this issue. When a particular search term is entered into Google, their job is to return the specific pages most relevant to the given search query. Your site is focused on various "facebook login" issues with pages such as "facebook login approvals" and others that are very closely worded to your money phrase.

If "facebook login" is the most important phrase for your site, and the /facebook-login page is the target of that phrase, you need to send a very clear and consistent message to Google on this topic. My concern is when I examine your sidebar right now, I see the same "facebook login" anchor text (exact phrase match) five times.

Three of the times where the phrase appears the link is to the correct target page. Once it appears in the tag section as a link to the http://loginhelper.com/tag/facebook-login/ page. I would recommend removing that tag. Having a tag link identically phrased to your most valuable page can lead to confusion. This tag anchor text is telling Google that when a user searches for "facebook login" the tag page should be the target. While you can also ask "I have three links going to one page, and one link going to another so don't the three links win?". That is not necessarily how it works. It's an issue which I would suggest correcting immediately.

The same goes for the "facebook login" anchor text which links to the Ghack page. You can still offer a link to the page, but don't use anchor text related to any terms from your site.

Do you guys think these factors could be related to the sudden drop for this page (no other pages on the domain are having issues)

It is definitely possible the two identical match anchor links are causing this issue. I can only say it is possible, not that it is a sure thing, but it is the most glaring issue I noticed which could cause this problem.

Joshua,

Your site has many SEO issues. My recommendation would be to either hire a SEO professional to work with your site, or sit down with the Beginner's Guide to SEO and take it one chapter at a time, applying what you learn to your web pages.

There are numerous possible causes for your page's bouncing in SERPs. You say this is your site's money page, but you definitely do not treat it as such from a SEO point of view.

You want this to be your site's "Facebook Login" page, but on your home page you present that exact key phrase "Facebook Login" on your sidebar in the "Links" section. This link directs users to a page on another site. That perfect match anchor text is an indicator to search engines you want the other page (http://www.ghacks.net/2009/11/18/facebook-login-phishing-and-account-hacking-warnings/) associated with the term "Facebook Login" instead of the page on your own site.

Another suggested change would be change your page's title from a H2 tag to a H1 tag, and remove the link. There is no reason to link a page's title to the same page it is located upon.