The games they release are complete in them selves, and with 15-20€ dlces every ~6 months they keep the games fresh with new content.
People rarely complain that features are missing from their games until it gets added in a DLC. Then suddenly it’s a mandatory feature.
I think if you like the base game, and it’s your kind of crazy, the paradox model is great cuz you constantly get drip fed more of the thing you like.
I think the paradox model is proven that paradox can buy a great game, and sustain it long-term.
However, paradox because of their model is unable to make a great game in house. Every attempt they’ve made at a new game more or less fails completely. At least in the last few years
So if paradox buys the game you love, great you’re going to get more content. But I don’t hold hope for paradox making a game for the love