i've done a lot of suvery before implement this on my own site.
check your own source code, you will find that you already get a lot of hidden links with vbulletin by default. all the popup menu links are.
with this mod, you will get one more hidden link which pointing to the same url of that page. this is obviously without intention to deceive users and i think google is smart enough to tell that.
and if the links were copied to the other sites, they become non-hidden links. of course they do help your seo.
PS. if you were so afraid of hurting your SEO, you could make it visible even in the original post. just not add the css. the back links will be inserted too.
|