Isn't this just the pay raise the Japanese company is forcing everyone to do? They're pretty late. A bunch of other companies announced their raises earlier this year. Doing this in October comes off as scummy.
As long as your AI doesn't somehow infringe on your training data, you're allowed to use whatever you want, just like reviewers, analysts, and indexers do.
You're good to go as long as it's original enough. If it isn't then that's just copyright infringement. You might as well have right-clicked "save as".
There are ads in them now? I didn't encounter any when using it a few days ago.
I just generated one and didn't hear any ads.