I like one or two other Stack Exchange websites but they have really low user participation. I want to promote those websites by mentioning their names with a link in my User's Profile about me section. I have seen some users doing this on our site on their profiles.

Is it ethical to do such thing? Doesn't it conflict Academia's website policies?

related question, but not a duplicate: http://meta.academia.stackexchange.com/questions/350/why-no-link-in-the-header-of-the-main-site-to-our-about-page

I like one or two other Stack Exchange websites but they have really low user participation. I want to promote those websites by mentioning their names with a link in my User's Profile about me section. I have seen some users doing this on our site on their profiles.

Is it ethical to do such thing? Doesn't it conflict Academia's website policies?

related question, but not a duplicate: Why no link in the header of the main site to our 'About' page?