I't say about game. Just for adult only. I don't understand about hat Ads. It's a Suggested game, but it can played by child.
So, without any think i clicked it. And I don't see anything about porn, about anything for adult only.
And all it's content just for child. Some times, Ads like this, unconsciously try to learn a child to find a new word for adult content.
Example:
I have never know what the meaning "18+" before i try to search it in search engine like Google.
And will never hear/read "18+" if i didn't see the ads like this.
Another text that would i see in Ads, is Game 3D Adult (Indonesia: Game 3D Dewasa).
18+, Sexy, and others.
In one side, it's make a big profit, but in another sides, it will affect the young future.
In my opinion, for this problem, because it's in Social media, there is should be a filter for Ads.
If the user under "18+", the Ads must clear from Adult Content, Adult word or anything.
And if the user above "18+" , it's will be a big profit.