If you publish in a journal that has closed access, there is generally no fee to publish.

What field are you in? In the life sciences, there’s normally a fee to publish closed-access and a higher one for open-access. My last paper was open access and costed about 3500, compared to 1500 pay walled.

Jibberish.

Always thought it’s a play on machine learning, but I’m most probably wrong.

Seems to work