So, I'd like to try a month of Pro, but I've only had Plus for a week, I'm not sure if it will be worth it long term, but I'm happy to try it out and see if it's something I'd use. So as far as I understand, if I upgrade to Pro now, I won't be charged yet. However, when my next billing date comes around I'll be charged for the 3 weeks of Pro less what I already paid for Plus? And If I left the subscription uncancelled, I'd also be charged for a full month of Pro. For a total estimated bill in 3 weeks of about $13-$14. Is that right? Also once a subscription runs out, are all of the things you had access to/used/created still maintained on the account and remain dormant until you reactivate the Pro subscription? Quote from wiki: I want to upgrade my current subscription. How does that work? The basic gist is: we'll fairly compensate you for the remaining time on your current subscription, you won't lose out on any money by upgrading part-way through your current subscription. Here's the nitty-gritty details. All upgrades are pro-rated. For example, if you upgrade from a Plus, Monthly account to a Pro, Monthly account, and it's half-way through your monthly subscription period, you would receive a credit for 50% of the cost of the Plus, Monthly subscription, which is applied toward your new Pro, Monthly subscription. Note: You WILL NOT be charged immediately when upgrading your subscription, instead you will be charged on your normal renewal date for the small amount of time that was left in the month, plus the normal monthly rate.