This applies to all, and currently it appears
all seem to be in compliance give or take

from the rules:

You may use a signature (also commonly used in email messages) on your posts on the Community Forum. You may set your signature in your member profile. Once you have a signature stored, you can choose to include it with any post you make by checking the "include signature" box when you create your post.
Your "signature" may not exceed two lines, and may contain one image no larger than 10Kb in size, 300 pixels wide and 50 pixels high. A typical signature contains the posterís name, e