Every engagement is scoped and priced before it begins. You get a written plan, and you keep it. I would rather leave a team able to run their own marketing than keep them dependent on a retainer.
Marketing results depend on your market, your product, your pricing and your own execution. I do not guarantee revenue, growth, rankings or any other outcome, and I do not make income claims. Anyone who does is selling you something else.
If what you need is outside what I do well, I will say so rather than take the work. Payments are handled by Stripe, and every digital purchase is covered by a 60 day refund with no questions asked.