There are now 4 ways that you can categorise your sponsors. Along with being able to mark them as a main sponsor, you can now also link them to individual categories as well as individual talks. The sponsor logos will then be shown on your site, depending on what you've setup.

Main Sponsors are shown on the landing page, in the footer of all emails and (in cases where there are no category or talk sponsors) on category and talk pages.

Category Sponsors are shown on category pages (for the categories they are linked to).

Talk Sponsors are shown on talk pages (for the talks they are linked to).

Custom Category Sponsors are shown on the landing page (if you add the Sponsor Grid component).