Strange ... I have the logo and slogan visible in my (paid) profile.
Users of other CAT tools (like SDL) have these official logos/labels indicating that you use these tools too. Cannot see what the problem would be.
See here for Jerzy's profile:
He's a big Studio fan. But only because he never looked at the fine CAT tool is Landsmann created.
If you like this idea, you can add a tag line and logo to your Proz profile:
<font color=#158C8B><b>CafeTran – The feature-rich CAT tool that is fun to use</b></font>
<br><br><img src="http://cafetran.wikidot.com/local--files/cafetran-logo/ct-brown-transparent-name.png" width="90">