We have a software tool that helps people build web pages. The tool, with the user's permission, leaves a small Image tag on the generated page with our logo, that links back to our site. It is similar to the "powered by" tags I'm sure many of you have seen on some web pages. In the Alt Tag for the image we put keywords related to our web tool.
Will the image link, with it's Alt Tag text, be enough to help boost our PR with Google, or will the link be penalized for being a non-text link?
thx