Some marketing firm did a study on a client's website where they found that popups increased signups by a substantial amount. Unfortunately, that client was an

Some marketing firm did a study on a client's website where they found that popups increased signups by a substantial amount. Unfortunately, that client was an Internet marketing blog primarily visited by aspiring marketers who've been told that popups increase signups by every popular Internet marketing blogger. The author of the submission probably reads one or more of those blogs. A study outside that toxic echo chamber probably wouldn't get the same good results.