The site was not helpful:
The site has both, but this is incorrect. Also, note how other products that bear a service mark have it in the headline but not in the copy. It’s okay to not have it in the copy, since it is in the heading, and it’s common to only use the service mark the first time it appears on a page, but this page has them for some and not for others.
It’s definitely the sort of inconsistency I notice on a Web site, and then I wonder what else is lurking beneath the unreviewed copy.