Hey everyone, we've got a well-established newsletter and have recently started 3 new newsletters for different sites we've launched. All newsletters are on ConvertKit but as they're from different sites/domains are on different CK accounts. I want to create links in our main newsletter that would easily allow our readers to subscribe to those other newsletters, i.e. 'click here to receive the newsletter from site no.2' - which, ideally, would prompt CV to complete the form for the 2nd newsletter on the reader's behalf. Does anyone know how to do this? I'd prefer to have it seamless rather than send our readers to a landing page.