Thanks, JB9.
The ads on AB are sourced from other companies. i.e. there are firms who accept advertising material from lots of different businesses and who then pay AB to have their ads displayed here.
So the people at AB towers have very little control over much of the advertising that appears on this site. While most of it is probably legitimate, I've seen several recurring ads for products and services that I regard as 'dodgy'. So, as always in life, it's a case a 'caveat emptor'.