What are the requirements and considerations for extending a visa exempt stay in Thailand?

The user provided an update from their recent visit to Nakhon Pathom immigration regarding an extension of their visa exempt status which was currently in its first 30-day extension. They are waiting for a decision by February 28th and noted the required documents including an onward flight ticket, a TM30 form, and other supporting documents. They clarified that there is no guarantee of a 60-day extension despite already having paid for the service. An update will follow on the specified date.