You should re-read my post. Especially the third block.
I never used the word coincidence. And when I used the word borrow, I was talking about bph borrowing from slay the spire.
But it led me to the question, how much could be imitated. A game like tetris is even copied with the whole name nowadays. And can you imagine what would be the result, if I put a devteam on the task: make me slay the spire, but with inventory items instead of cards.
The thing is, this is more a game mechanic. It is rather seldom seen - for now. It is a little bit more comples than match3, but has about the complexity of rpg maker core rules. The current setting is very slay the spire, but I hear they want to add some kind of story or story mode. If bph gets very popular you might even see rpgmaker games with inventory mechanics instead of japanese turn based attack, special, guard etc fight mechanics. Just like you saw match3 implemented in several games. I remember puzzle quest ;-)