How can an agency make money on contextual advertising?

Question

contextual advertising

What is the best way for an agency to make money on contextual advertising? What are the options ?
As I understand it myself, there is 1. a direct agency agreement with Yandex Direct, 2. elama (they seem to have a percentage for adwords too) or 3. an account without VAT.

Answer 1

4. Conclude a direct agency agreement with Yandex.Direct (but you need to meet certain conditions for the volume of budgets, the number of clients, certified specialists) and take an additional commission from clients.
That's how most work. And this is no accident.