The efficiency boost doesn't work on my end, watched three ads and the efficiency didn't increase.
I'm guessing it works like the Reset Activity boost, adds efficiency every hour. Unconfirmed.
I have just seen a tweet confirming it is +5%, like the reset activity. I am wondering whether video+reset gives +10% per hour
Aye, it's a potential net gain of 10% every hour, 8% with the hourly Efficiency decline. Put another way, the videos are cumulative with the hourly check-in.
And this is just the tiny first step of many more to come.
Are you sure the hourly efficiency decline applies even if that hour you have checked in on your mine? I think it doesn't, as when i check in, I see a 5% gain and not a 3% one.
Did you increase the decline because of the new feature? Or not yet? (you said that for now, as there are not many ways you can increase your efficiency, the decline is tiny, but it will go up with the new features you add).