I've had Flipboard on my phone for 5 years and use it daily for a variety of articles. The last year the number of pop up ads have gone to warp 10. I've written to Flipboard numerous times explaining how difficult it is reading an article when I'm constantly getting bombarded with pop up ads. Their response was the ads were coming from the source of the article and not Flipboard themselves and they have no control over the pop up ads.
I haven't been insulted like this in a long time. There are so many different apps on the market today. I deleted Flipboard today.