The most common complaint given by consumers as a reason they
unsubscribed from a company’s permission-based emails was that they
came too frequently (54%). Another 49% (more than one answer permitted
to the question) cited the content becoming boring or repetitive over
time. Receiving too many emails closely followed, cited by 47% of
respondents.
Oracle released results of a global survey of 3,000 mobile phone users, which highlights a few key trends: