I know there have been a number of frustrating issues regarding Referrals 2.0 ads. Some of these are the result of underlying technical issues, which we're constantly working to resolve as quickly as we can, and some of these can be solved by publishers selecting certain settings when generating the referral code. I've been working with our referrals specialists and we wanted to share solutions to a few very common problems below.
1. If an advertiser ends their campaign or runs out of budget, those referral ads become unavailable and will stop showing on your pages.
If you've selected 'Pick best performing ads' or you've selected keywords or categories for your ad unit, then we will rotate different referral ads to fill the referral unit. If you haven't checked that option, your page will display an empty space where the now-unavailable ad used to appear.
To maximize your opportunities to generate referral earnings, we therefore recommend you check the 'Pick best performing ads' box when generating your referral code.
2. However, if you select an ad unit size that is only available for Google product referrals and check 'Pick best performing ads,' there's currently a system error that will cause no ad to be displayed. Our engineers are working to fix this as quickly as possible, but in the meantime, if you'd like to refer users to these Google products, please uncheck the 'best performing ads' box when generating code for that referral ad unit.
FYI - Many of you noticed that some of your referral ads weren't showing for a short time late last week. That particular error was resolved last weekend and shouldn't cause any more display problems.
Our engineers, product specialists and I sincerely appreciate your patience as we work out these Referrals 2.0 kinks. Please keep giving us your feedback on this product so that we can deal with bugs right away, expand the features that are working best, and generally continue to improve Referrals 2.0 for you.