Вот такое письмо пришло:
To our Dyn free hostname users:
For the last 15 years, all of us at Dyn have taken pride in offering you and millions of others a free version of our Dynamic DNS Pro product. What was originally a product built for a small group of users has blossomed into an exciting technology used around the world.
That is why with mixed emotions we are notifying you that in 30 days, we will be ending our free hostname program. This change in the business will allow us to invest in our customer support teams, Internet infrastructure, and platform security so that we can continue to strive to deliver an exceptional customer experience for our paying customers.
Краткий пересказ: бесплатного dyndns больше не будет, приобретайте VIP-статус.