Can an Australian get a second 30-day stay in Thailand by crossing to Cambodia?

An Australian can initially stay in Thailand for 30 days without a visa under the visa exemption rule. To stay an additional 30 days, they can exit to Cambodia for a passport stamp and re-enter Thailand. Alternatively, they can apply for an extension at a local immigration office for 1,900 baht, or they may consider border runs up to twice a calendar year for a new visa-exempt stamp.