Excuse me, but I did and it still didn't really work. Maybe it does and I just was too dumb to figure it out?! All I can say is that the paid version of AdGuard was a waste for me for the purposes of blocking ads with games. (As I said, I don't care about ad-blocking for web browsers on my cell phone or tablet.)
Just tried DNS66 for blocking ads for games (not browsing) and it doesn't work any better than Blokada or AdGuard. Yes, I used DNS blocking and I added all the host files. As far as I know, there really isn't a way to block game/app ads on Android without rooting.