Node propagation to front page

Ok, here's what I want to do: I have a role "accredited user", that get's assigned after the user has earned some trustworthyness. Once that happens, I want to automatically create a profile page for him/her, that get's promoted to the front page. For this, I created a new content type, which also has the "promote to frontpage" checked in the workflow settings.

After assigning the role to my testuser, the node in question is created with the desired content type, but for some reason, the workflow setting does not seem to be honored. The node is not shown on the front page. Am I missing something or is this not implemented?