Just as we did in T298057: Account creation: JOSA landing page, we need to make a dedicated "CreateAccount" page for the GLAM events in Latin America. There are multiple events, but all the events will share a page that contains the chapters' logos.
They'll skip the welcome survey and bring all users straight to their homepages, without any control group. They should be in imagerecommendation variant.
They may also have certain topics available just to them. See T301029: Account creation: GLAM event topic availability.