It's difficult to predict how a specific ad will do as it is based on a number of factors.
The different factors that affects your campaign includes: time of the week, time of the year, what's in the news, relevance to your audience, imagery, the campaign page itself, how much you invest, etc.
However, for a typical campaign, we will generally see an average of a 4x-6x return on investment.
For campaigns that select the Standard or Premium packages, we will typically test out a few different target audiences in the first few days to see which has the most positive results and then stick with the audiences that do best for the rest of the campaign.
We hope this helped as always, if you have any questions, feel free to reach out to our marketing department by emailing firstname.lastname@example.org and we are happy to assist you!