You can create treats for anyone or for everyone if you're really ambitious. We are encouraging letters, and will put up a letters post to collect them. At the same time, we'll make all the requests live on AO3, and we'll add a link to the Requests Summary page for easy access. Currently the plan is to hold off on making the Requests Summary live until a little later, to encourage people to focus on creating their main gifts, but if there's enough interest, we can make the requests visible sooner. There is a separate treat archive for all treats, no matter what size, which will open at the same time as the main archive, but will remain open for posting all year even after creator reveals.