I think, when advertising on Instagram, you shouldn't go for direct clicks/downloads but for the name of your game.
I
expected and got fantastic results with these fat burners for men and don't think a lot of people will hop on their pc and go download it instantly, but whenever they're searching or thinking of searching for a new server they might remind your server and look it up.
When advertising on social media (non-Youtube) I'd personally advertise on Facebook since you have more desktop users and also when browsing Instagram I don't even look at the ads most of the time, I just scroll further without
taking a second to actually see what the ad contains, and got this less when I'm on Facebook.
but that is something personal I think.