Chargify was underpriced.

Unless you have some inside information, it's hard to say if they were undercharging for their service. Without knowing what their overhead was like I don't think it's fair to say that the service was underpriced. Just because they can charge a lot for something doesn't mean they should.

One would hope they would have been able to sustain the free tier based on the revenue from the paying tiers so that they could sustain the free tier in the hopes that many of them would become paying customers.

On twitter, however, they claimed this change was a move to get rid of accounts where users had paying customers but weren't actually paying chargify yet. This would have been fine, but they also doubled prices for anyone who had between 50 and 500 customers and raised the prices for the other tiers as well. Their explanation doesn't match with their actions.

  Chargify offers great service.

In my experience it was really just mediocre service. While I give them credit for trying, It seemed like Lance was handling a lot of the support himself and to his own admission he's not a technical support person. There were a couple of times he just sent my partner links to the documentation without actually answering a question. No offense to Lance or anything, but it was clearly a good idea to hire a technical support person. The only problem is, now that I'm fully integrated, I don't really need help / support unless their service goes down or something breaks.

  Chargify has been very transparent.

Only after the fact. Sure, they get a couple of points for that but I still wouldn't consider this a good thing.

  You must do your own due diligence

Do you often ask a service if they are going to raise their prices any time soon before you sign up? Do you think they would have said yes if I had asked them 6 months ago? Honestly, I thought $49/month was a pretty fair price and didn't really expect it to change any time soon. I looked at all of the options out there and felt like chargify offered the best service at the best price. Would you consider me foolish?

The bottom line is that they offer a great product but it still needs some work. Doubling what I pay for it really broke my trust and if they don't fix some of the issues with the product soon, I'll be writing my own solution.