Yes. Each Automation run draws from your monthly credit balance the same way an Agent run did. Three weekly Automations use the same credit volume as three weekly Agents.
Because the guided migration flow is quick, it's common to end up with more scheduled jobs than you had before. Before sunset, review your active Automations list and make sure the cadences are intentional — one daily Automation that covers several things is more credit-efficient than five narrow ones.
Note: Enabling Moby 2 doesn't change your credit balance or plan — those are managed separately. If credits are running low, that's a billing question, not a Moby 2 question.