No, you do not need to pay for an additional seat in Webflow after already paying for one. Webflow offers a per-seat pricing model, which means that each seat you purchase allows one user to access and manage your Webflow account. The pricing for each seat is based on the plan you choose—either the Individual plan or the Team plan.
In the Individual plan, you can purchase one seat at a time, and it is intended for individual users who do not need collaboration features. If you have already paid for one seat in the Individual plan, you can use that seat for yourself. You won't be charged again for another seat unless you want to add additional users to your account.
On the other hand, the Team plan is designed for collaborative teams and allows you to purchase multiple seats. If you choose the Team plan and purchase more than one seat, each seat will have its own separate cost. However, if you only have one seat in the Team plan, you do not need to pay for an additional seat unless you want to invite another team member to join your account.
It's worth noting that each seat in a Webflow account has its own separate login credentials and permissions, allowing individuals to manage their own separate projects within the account. So, make sure to choose the plan and number of seats that best align with your needs and requirements.