Hello, newcomer here

[Tripredacus]

I can say that prior to me being able to find the tobacco card sized pages like in your picture, I could have cared less about those size cards from any product. It was after getting some of those pages that I had attempted to build the mini set (of any back/parallel) for 2015 Allen and Ginter. I have since abandoned any attempt at building or maintaining a baseball set, so now I just have a binder with all those different mini cards I had picked up over the years.

[Farm_kid]

I enjoy the set building part of the hobby more than speculating $$$ and only going for my favorite handful of players. The internet makes it possible now to slowly build these somewhat obscure insert sets. But it does take a lot of time.