The collections on AmericanAncestors.org that are not included as listed in an online article entitled, "Welcome to Your American Ancestors Affiliate Account!" At a meeting yesterday of the Utah Valley Technology and Genealogy Group (UVTAGG), it was mentioned that some of the listed collections are available elsewhere. Here is the list:
I checked several of the collections through online searches. For example, I found a few back copies of The American Genealogist, digitized and available on Google Books. A complete set is also in the Family History Library in Salt Lake City, Utah. You might also check on WorldCat.org for additional library locations. See The American Genealogist.
Another example, the third item on the list is a book.
It is available, digitized online, in the FamilySearch.org Books section of the website.
I suggest that if any of these collections are of interest to you, that you do a thorough search online for an alternate source either digitized or sitting in a library near you.