I didn't get. Why anyone claim that this board is cheaper while RPI 4 2GB cost 35 bucks and have much much better CPU? 4GB doesn't make sense and almost always

I didn't get. Why anyone claim that this board is cheaper while RPI 4 2GB cost 35 bucks and have much much better CPU? 4GB doesn't make sense and almost always is an overkill. I made a huge research trying to find cheap and powerful board for my prototypes. And RPI always wins in the price. Even Chinese clones are more expensive. Why? It turns out RPI is a non profit.