My final thoughts in this case.
I understand that making a product / project and paying the development process while other bahamuts take it for free and profit the millions can be infuriating and frustrating. Sometimes, they obfuscate you by the seer force of being the big fish in the tank. Amazon, Google and others offering your service and your product with no payback, nor in money, nor in code, nor in anything but good words and pats on the back is barely acceptable.
I can understand this move.
In the other hand, they have been profiting in being an open-source project. By contributions (Redis core and drivers), distribution (linux distros including in their repos), free advertising, and sympathy for being an open source project; they have grown and expanded on this. Other products, not being open source, didn't have this benefits. Now, changing suddenly the licence feels like a betrayal on people who have chosen and invested on that project. Specially when you do it with little time to prepare, without warning and from one minor version to another. This move seems more like a money-grabbing trap than an investment and project protection. And it also has hurt the confidence in the project.
I don't think this was a good move.
For the moment, I will continue using Redis as a lot of people (I suspect), because for my use - not reselling the product as service but using it inside my project - doesn't seem to be affected. But I have my trust somehow broken and will keep an eye on alternatives.
As an aside, these are (new and old) alternatives for Redis