Ad spend, as above. Beyond that: paid software and subscriptions are yours (email platform, scheduling tools, stock licences), and we will always recommend the cheapest thing that does the job rather than a tool we resell.
Also not included at any tier: logo and visual identity design, print production, PR and media relations, and influencer contracts. These are real disciplines and there are people who do them better than us. We will happily work alongside whoever you bring in.
Starter specifically excludes strategy and positioning work. It is execution on one channel, which is a deliberate limit rather than an upsell trap.