GLP-1 drugs don’t require marketing. There are tons of people who have been prescribed them and aren’t being covered by insurance. Both Novo and Eli Lily are now selling them direct to consumers with prescriptions that don’t have insurance coverage.
But they still market regardless. They probably constitute 50% of the medical ads I see now
The marketing isn't for the drugs.
They market the service that gives you the drugs with the smallest oversight possible. These services are becoming popular among people who shouldn't be taking GLP-1s (eating disorders, body dysmorphia, people who are too thin but want to lose more weight) because most of their providers are just trying to write prescriptions as fast as possible to collect their payments.