[prawn]

I think you have to prove yourself indispensable and really charm people with functionality that is surprisingly effective. I pay for iCloud (former) and Spotify (latter - their discovery constantly astounds me).

I need something like Dropbox and begrudgingly use the free tier interacting with my clients who use it, but I find myself trying to avoid paying for it or locking in on it. Something about it is just off-putting.