What are the requirements for entering Thailand with a visa exemption after using the METV?

The post discusses an individual's experience entering Thailand with a visa exemption after using a Multiple Entry Tourist Visa (METV). Upon arriving in Phuket, the immigration officer asked about their purpose in Thailand and issued a stamp after verifying a return flight scheduled within 30 days. The author prepared additional documentation, such as a 20,000 THB cash amount and a condo lease, but these were not requested by the officer. The post raises questions about what would have happened if only a flight to a neighboring country was provided.