The text ads are on the bottom of the homepage in small letters. Perhaps it is their SEO firm.

   They are using Optimisation not Optimization, so it is probably an English SEO firm – seeking UK customers

That lucky SEO firm is getting a bunch of PR 8 Back Links to their internal pages

   BTW:
Some of you may eventually guess the name of the company, but the only reason it was not named was so as to not hurt that seo firm, since this blog is read by Google