It’s true for TCG online, but I doubt it will be the case for this one. They announced nothing regarding micro transactions nor how to get extra packs. They can totally make this one free, as it’s marketing value for physical cards is enough by itself.
I started with kbin but left it for lemmy + mastodon. It was not mature enough to handle so many users (which was unexpected by its own creator). Too many issues with bots, the instance itself, and the lack of mobile apps motivated me to move on. It’s sad because it’s creator seemed pretty invested into its project (and I loved the UI, and the ability to get both a Reddit-like and a Twitter-like experience).