Apple's App Review guidelines used to say something along the lines of "If you have a problem, trashing us in the press never helps." I'm not trying to place judgment on Puffin, but this seems to be the wrong strategy. False negative App Store rejections are typically due to a misunderstanding than a nebulous "corporate greed" angle... or sometimes they were even (at least sort of) justified in the first place [0].
See also: when Rollout got rejected, their open letter [1] didn't help them either.
See also: when Rollout got rejected, their open letter [1] didn't help them either.
[0]: https://9to5mac.com/2016/10/10/apple-dash-removal-from-app-s...
[1]: https://rollout.io/blog/open-letter-to-apple-secure-javascri...