Joe hit it right on the nail here. We examined our costs very carefully and found some room to give back to our community.
The right blend that we were going for was give enough to do dev/test for free, and be reasonably priced (https://phpfog.com/pricing) when you are ready for production.
When Linode gives away more RAM or AWS makes inbound traffic free, it is not a sign these companies are less trustworthy, but that they love their users. We love developers and are trying to do right by them.
So thank you.
Why didn't they link to it? It definitely sounded too good to be true.
Now that I found the pricing, my impression is: "OK they are trying to get more people on their platform so that once their sites get popular they will upgrade to paid plans." That seems more reasonable, but is not mentioned in the somewhat sleazy-sounding blog post.
I don't think their catch is bad at all -- it's standard platform marketing to offer a free trial. But at least link to your pricing. Say what the limitations are of the free version and what you get for paying. It should be easy but instead it left me wondering and it took several clicks to find what it was all about.