AT&T / YAHOO Hosting does not allow .HTACCESS file to be installed on their server. Why is that?
No, you’re not wrong. Yahoo hosting is expensive for what you get and very restrictive. I have had a Yahoo store for over 5 years now and I host very little on Yahoo hosting. Anything that is not directly tied to my Yahoo store, I host elsewhere because Yahoo hosting is either too restrictive (.htacess files is an excellent example) or because Yahoo hosting is too expensive. There are many, many good, inexpensive web hosting companies out there. If all you’re looking for is web hosting (not a store platform), I suggest shopping elsewhere.