Thank you very much, I'm really glad you enjoy that gamemode!
And yes, it's a mechanic I think I created. I released Minesweeper Reborn on the play store back in 2017, and at the time, it only had the reborn mode because I didn't want it to be just another clone of the original game. I wanted it to be my own version of the game. I added the classic mode a few years later due to many requests in the reviews.