I really wish people would stop likening it to creative mode. It’s as bad as any other hyperbolic claim made the by the current “free the colours” movement, and as such is really just unhelpful to fair, reasonable discussion.
Creative mode is a thing that exists, by name, in other games, and refers to a system where you can magic anything out of thin air and have god mode and generally do as you please. No-one here is asking for anything close to that, and certainly not connected to the live universe.
I’m really hoping a billing period is the same whichever package you buy, and when you buy a longer package, you’re just pre-paying for multiple billing periods in one go (although I would expect you to only be able to access those refreshes individually as each billing period rolls over though). In that sense, it could roll over and stack, although I’d also be happy with a 30 day countdown starting from the last time you did it.
On topic:
Personally, I think that a big part of the problem with sprays is that they’re great for fine details, but woeful if you want to build anything big out of a non-standard colour. As such, I definitely think they could use a re-balancing. Downside is, if they actually become usable for bigger purposes, you’re still butting heads with the colour scarcity advocates. I feel like this topic has become what it has because there just is no acceptable middle ground to even one side, let alone both.
I think it’s one of the decisions where the developers will just need to work out what they want to do, or what they think most players (as opposed to the most vocal) want and bite the bullet, either changing it to allow all colours or changing nothing at all. It’s going to annoy some people either way, but it’ll hopefully start to pull the game out of it’s current grey area where it tries to be too many different things for too many different people.
In that respect, it’s a good idea for a poll.
[Edit]: I’m assuming the ‘no’ answer in the bottom poll is supposed to be “No - I won’t mind if we have changes to color rarity mechanics even if it effects economy, etc.”