Quick question about ads

Im planning to do a low budget sponsored ad for my game Flamethrower Engine (“Flamethrower Engine! - Roblox”), and I was wondering if i did a high CPM amount (like 0.1-0.3), would my game gets aggressively pushed out to players, but last shorter, or would there be no difference?

Or in different words, how can i put my ad credits to like the first 30 minutes of the sponsor, then let it die out after that?