That is what it means, to sell content. That is what actual expansions are. This song-and-dance where you have the whole game, but you're not allowed to really have the whole game, is inseparable from everything you would call predatory. It's only a matter of degrees.

One of the several alternatives you've repeatedly ignored is that these additions can be added to the game people already bought. Surprisingly, this does not involve slave labor for artists, because games that stay popular keep selling more copies. Do they make as much money? No. But it turns out maximum corporate revenue is not a guideline for ethics.