There was a period last year where almost everyone already holding an ICICI CC was offered Coral Rupay LTF on the iMobile app. That's how I got mine. It was on all the fintech facebook groups, I'm sure they issued thousands of those cards. Also, the MMT cards don't have annual fees. Just one time joining fees of 500 and 2500 for the red one and the black one. I got the red one a few years back for 500 because my Apay card was not eligible for most ICICI offers. And of course, Apay is always LTF. There's actually a lot of easy ways to get LTF ICICI cards.
It's their more premium ones that are harder to get LTF. For example, I don't have an ICICI account but I have a preapproved offer for Sapphiro for 6,500 joining fee and 3,500 a year -- you'd have to be insane to take that deal.