Hey @Bas_de_Bruijn ,
I am afraid this does not work the way you interpret the latest updates: for people to use the doc with the embed, they need to be authorized in BOTH the source doc and the doc with the embed.
At this point in time, the only ‘advantage’ of the embedding is that you can make really small, subject focused docs with pages with full functionality, but it does not prevent them from opening the source doc. In some situations they will even end up in the source doc if they follow links to the originating tables (see one of my earlier posts: Launched: New ways to integrate your toolstack into Coda - #59 by joost_mineur)