Just to be clear...you "get" what would be considered a rare/epic cosmetic each month of the sub (May: Carbon Fiber Weapon Skin; June: Geesuit; July: OP-AI Hologram), of which those announcements have been "on time" each month. I could care less if you want to unsub due to what you wrote about in your OP, to each his own...but to say that..."I just can't keep paying...a month for nothing." is far from the truth.
Not to single you out but while it may not have been your intent, I felt like the tone of your response was unnecessarily dismissive. zdoofop has valid concerns.
This is on the front page of my.ember.com, a promise of monthly RPG ruleset updates, monthly chapter drops and monthly unique skin. The skins so far have only been concept art which didn't require any time or effort from Grummz as a 3rd party is doing them. Right now we haven't actually gotten any skins, only the promise that some concept art will in the future be turned into skins.
Last month Grummz promised 2 chapters after skipping a drop in June, and then again did not follow through, nor did he post an update for the RPG rules. He promised to release a book chapter last week, and again failed to deliver.
Peoples reason's for subbing are naturally varied, and if a monthly skin isn't why they subbed then they really are in a sense paying for "nothing" they wanted. I feel it is important not to be dismissive of someones outlook simply because it does not match your own.
@zdoofop FYI Grummz recently released a new update to the tabletop rules, hopefully that means a book chapter soon as well.