I've made a great friend with a pen pal I met in July 2023, our letters started off as short-medium length exchanges that quickly grew and grew in size the more that we talked about and got to know each other.
Since our first exchange, we've become quite close friends and introduced little sections to our letters that digress away from topical conversation. I say little sections... one section in particular which sees us exchanging song recommendations alongside, why we connect with a song, has become quite lengthy indeed but is a staple of our letters. The past few letters that we have sent saw the word count creep above the word limit for a Slowly letter (something close to 10k words I think?) so we have to split our replies into 2 letters!
My suggestions is this: What if we had achievement stamps that can be unlocked maybe every thousand or couple thousand words that we achieve in a single letter? For example, if my letter contains 1987 words, I might get a stamp for sending a letter containing 1000 words. Then, I might send another which contains 3034 words, which nets me another 2 stamps; one for surpassing 2000 words, and another for 3000 words.
This will reward the dedication and effort that we put into writing up our very detailed and extensive letters and recognise us as a "Chatterbox".
Regardless of the outcome, thanks for reading!