A lot of these games and collectibles have been very successful. I think as long as they can continue to put together something fun and enjoyable, we will continue to see more things like it.
Axie Infinity is probably the best example out there now. Splinterlands too, though it hasn't gotten as much attention as the latter.
They told me that to get started with Axie Infinity you have to face a cost of $ 600, so I haven't even tried. I prefer Splinterlands