As it's the use of the word "unlimited" that people are arguing about, let's just amend that to "no set limit, like before". So it could be unlimited if the IO considers the entries are not being used to live in Thailand indefinitely.
I suspect what he was saying was there's no specific 2 entry limit on land border entries now. But. . people using the new 60 day exempt entry for tourism as a means to live in Thailand might be refused.
Perhaps the phrase should be "no specific limit noted at present, so you enter on the 60 day visa exemption until the IO says no". It's perhaps like other exempt entries, it depends how you're using it.