Well, let's face it. App development and maintenance costs money. The weather info (will be discontinued on our apps) on your app/face is not a freebie. Developers have to pay a monthly fee to keep them running. And they need to buy a beer every now and then. Timezone info is not free also, actually all web provided information costs money.
That is why you need to pay for our apps and clockfaces. We keep up with that using Kiezelpay. A great micropayment provider.