I'm wondering what prevented the author from having the sales call and seeing what rates they are willing to offer. Best case they might even be better than the current rates.
Why did the change need to happen if this is a plausible outcome? Why add the risk to an existing customer that by all metrics is already loyal? Wouldn't an email with a % price increase and explanation been more acceptable? Why the drastic change in price?
It's someone trying to squeeze more revenues quickly and by doing so, damaging their brand / reputation.
I'm not trying to defend DNSimple and their decision to not keep the legacy plan around for existing customers. Sure, that's a hostile move that seems the be designed to squeeze more revenue from their existing customer base. I'm just wondering why the author didn't at least try to explore that avenue.
Also, when someone is barely satisfied with the current offerings, something like this would be the impetus needed to do something new.