How quickly you can scale up depends in part on how quickly conversions happen after people click on your ads.

If people take 30 days to convert then can take quite a while to optimize & scale up.

If you're promoting something where conversions usually happen within a few minutes of people clicking on your ads, then you can scale up very quickly... If you've spent $10 in one day and made a 20% ROI, then:

1) First of all you're going to need a lot more data, sooner rather than later... because after spending only $10, your ROI is probably not statistically significant.

2) If your data IS statistically significant, then I wouldn't wait another day to scale up to $20... I'd spend $20 more immediately - like within the next 5 minutes if you can. Then (assuming your conversions happen fast), you can wait for 20 or 30 minutes to make sure you've got all your data in... and if you're still at a 20% ROI, then raise your budget and spend another $30 immediately. If that's profitable also, then spend even more, asap. If you're making a positive ROI, why wait until the next day to scale up?

Makes sense, I am a numbers person by nature, so I enjoy the game, however CPA is all still relatively new to me, so how the numbers game is played, is still in the learning process for me, Thanks

I guess this thread died lol