Is it risky to return to Thailand on a 60-day e-visa after previously being questioned by immigration?

You should be using atleast regular tourist visa not exemptions. If you're going to your home country either apply for a 6 month multi entry tourist visa. If you get the last 60 day stamp just before it expires you can get 8-9 months out of it without questions or even better get a DTV visa using a soft power and don't worry about visas for 5 years.

Just get the proper 60 day tourist visa at the embassy or go for the DTV route.

The limit of 2 visa-exempt entries by a land border has been discontinued on July 15, 2024. It now is unlimited as well, like visa exempt entries by air have always been “unlimited”

However, I would only pick up that term “unlimited” with a pair of golden tweezers.

At some point, after having done a certain number of visa-exempt entries, and even after a couple of entries on tourist visa, you will be pulled aside, and on your next attempt, you will be denied entry.

Having "no limit"- that’s up to the discretion of the Immigration officer you are standing in front of

And don’t forget: after you were pulled aside and questioned, they will have “flagged” you in their computer system. Any Immigration officer in the future is able to see this

So you better get “the proper” visa for your intentions and pray they will tolerate your previous “misuse” of the visa-exempt system

If you do not overstay you can enter Thailand as many times as you want.

You could apply for a visa now for your January trip. You have to use it when doing border bounces.

I have been in Thailand nearly ten years and most of that time was tourist visas. I have been pulled aside by immigration twice. They yelled at me, then let me in. You will likely be fine but you are assume certain risks.

3 X 60s .....after that risky

Why did you get pulled aside? Do you have a history of Visa Exempts and/or border runs.

Use a land border bounce agency and you should be fine getting another 60 days.