"Mailing list" also includes a magnetic tape or similar device used to produce written or printed names and addresses by electronic or mechanical means.IMHO you will be fine

I'll talk about the difference between the two.For google search, your ads can appear with Google search results and on other search sites when your keywords are relevant to a user's search.Google the defines its display network as an opportunity help you reach people while they’re browsing their favorite websites, showing a friend a YouTube video, checking their Gmail account, or using mobile devices and apps.Problem with the display is its reaching people higher in the funnel, thus costing more to convert.With the metrics your giving I believe a large chunk of your traffic is going to display.Use "search only".Hoped I helped the community, and if anyone has any question feel free to reach out.- Angel-Ty L.

However it isnt to be used as a spam device.