now, whether it's valuable enough to justify the price – depends a lot on how you use your email. we've got users managing 3-5 accounts with hundreds of thousands of emails each and they use our labeling/organization more than removal. think of it as of a way to act upon a group of emails no matter what the size of the group is.
(and I kinda think our website is not really good at communicating this – our traffic is mostly coming from android app right now and we've been putting website work off. who knew!).