Unity Ads, use 1 Id game for many games.

If I use 1 id for many games, what would be the effect on the ad display or the revenue from the game?

 

Don't

You'll hit our limit of ads per day if users are playing several of your games during same day (https://unityads.unity3d.com/help/faq/monetization#why-am-i-only-seeing-2-or-3-ads-at-a-time-) as well as our algorithms won't be able to optimize for the individual game, i.e. you'll likely get lower revenue.

/Rasmus