The double-dipping (cash shop on top of sub fee) is one of the big reasons I left FFXIV and came back to XI.
Now XI is double-dipping as well, only a few months after I came back. It's a bitter taste.
I see a lot of arguments in this thread about why double-dipping is "okay" - the content is optional and it's not pay to win, and no one is being forced to pay extra, so what's the problem?
The problem is that people who are already paying for the game every month feel like it's a slap in the face. We are already paying, but not getting all the content the devs are implementing. Worse, the time the devs spend on creating and implementing cash shop items is likely time taken away from the development of regular content that all subscribers have access to.
Charging more for storage in a game like FFXI is extra-hard to swallow. The game was designed to allow players to play every job on one character. While the one-character model has always been lauded as a brilliant move in an MMO environment, allowing players to preserve their community identities while simultaneously trying many different jobs, it of course leads to huge inventory issues. Many of those issues have been alleviated through quality of life upgrades, and I'm sure the playerbase as a whole is as thankful as I am for that. However, it does tend to be a punch in the gut when the devs, who know the strengths and weaknesses of the one-character system as well as the players do, charge a premium for expansion of storage.
For a long time MMOs fell into one of two categories: free to play with a cash shop, or a monthly subscription fee with all content available to every player who pays for the game monthly. And it worked, players had their preferences and followed them. But as things like this usually go, someone in corporate looked at these models and thought "if the players will pay for both, why not use both?" I understand SE needs their money, but XI players have already been giving and giving and giving, for 15 years now. And I know I'm not the only one who left XIV disappointed to come back to XI where the grass was greener, the game more fun, the double-dipping nonexistent. Until now.