People who design pretty marketing emails and are sick of having them get destroyed by email clients. You want to do as much as possible with as little risk of

People who design pretty marketing emails and are sick of having them get destroyed by email clients. You want to do as much as possible with as little risk of it getting mangled. To be pedantic, no one really wants to write markup. Marketers want a simple solution that lets their emails get through intact. This is not a bad solution to that problem.