I have been getting Too many requests message in the last month. The site has been up and running since 2010 without any problems. All I have to do is request a page and the error appears (not every time but far too frequently for comfort). A few minutes later the problem is usually gone. The site has very low traffic so the error is hardly valid. Cpanel shows 0 resources used except for disk space usage (approaching 1 Gig (924.71 Mb of unlimited available storage).