Ads can vary in length. On average, each ad is 30 seconds. You are looking at roughly 15 minutes worth of ads. I also updated the total above.

@Sypes how are you getting 20 pnn ads?

That is just the amount that the game gives you. You get 2 ads after every PNN segment, even if the segment is that there is no news. You do have to play the game day though. If you quit the day, you may be delayed on what PNN presents to you.

@FLIPSTATIC ENERGY the PNN news diamonds won't get lost after you watch the ads and quit the game before any customers, if this helps

We have found that this is not always the case. This is why we suggest to finish the game day. This also helps with confusion during events where you do have to complete the game day to solidify your event progress.

I guess I should say finish all the daily tasks (which will earn you diamonds along the way) and also extra cash, and then watch PNN news diamonds. This is what I've been doing and it works fine, and yes there is a limit to how many you can watch in a day.

I did the quit game strategy for 11 gems

Also I have 9 buddies left so that is 360 gems

Meaning I should get all of them in 36 days if I watch all ads every day. And of course I am earning gems through achievements alont the way so I should get it within a month

Do not forget the upcoming events. You may want to save some gems & funds to purchase decors.

Nah I dont buy the decorations which cost gems

https://youtu.be/_5mjcGQnmnU