@Brandon ***********
Most people fly to Cambodia from Thailand even when the land borders are open. It's cheaper and easier.
I noticed that when the borders were open the majority of Westerners who crossed were border runners except for actual tourists using buses to travel one way to Siem Reap, but not back into Thailand that way.
Hat Lek / Koh Kong attracted some backpackers but the numbers were never really very high compared with Nong Khai or the Malaysian borders.
Anyway, Cambodian borders could be closed forever or until at least sometime next year. Anyone's guess at this point.