Integration with optional donation service?
It would be nice to support integration with some creator donation service (e.g., https://www.buymeacoffee.com/ ) so that requestors can optionally give back and defray some of the sticker costs.
Sticker claimed exposed on API
It would be great to know when a sticker has been sent (eg form filled, approved and mailed) so that we can take action on that (in my case adding a tag to the contact to say they received the swag).
Internationalisation of copy
It would be great if the site and our copy was able to be available in languages other than English.
I strongly prefer classic email/password authentication over Google. Every time I use Sticker Space I have to sign in again which then requires me signing in to Google.
I'm not quite sure on logistics, but I would like to send several stickers to one address. Maybe it could be a feature called "sticker packs" where someone could specify a maximum amount of stickers the recipient can request. I wouldn't want it enabled by default, either I would want it to be a separate URL or enabled via something like a product code. The main use case would be for sending people stickers to hand out to others. Like a pack of 5 or 10 stickers before a conference. Or just ordering several stickers for me to have on hand.
Show mandatory custom fields
Some fields like the address would be mandatory, but others like the custom fields may not be needed. It would be nice to be able to set what is mandatory and what is not, and to show that on the form.