On the social media side of things, it has gone all but quiet. I wonder how many of those who put their address up on the official InCoWriMo website checked the Disqus comments regularly. Not a great percentage, I would say. On InCoWriMo-2017, there are still some addresses up until no later than November 1st (although mine is no longer displayed).
There have been stories elsewhere of people being quite overwhelmed with the quantity of letters received, but others not so lucky.. I wrote a few surprises and have received more besides. Some of the surprises were random - scrolling up and down the address book with eyes closed until I stopped then chose an address from those shown. Others I had chosen because I'd seen comments there/elsewhere/Instagram.
As for the first letters themselves, there is a variety, and of varying interest. In the past, I have received letters I would say were exceptionally boring, but I still thanked the person for the letter. Perhaps they hadn't written letters in a very long time so didn't know what to write. I was amongst them when I restarted penpalling in 2007/8. I guess my letters could have been incredibly boring as not all of them even yielded a reply (they can't all have gotten lost). The first letter is currently being discussed on the forum. http://s-mail.proboards.com/thread/557/first-letter and I hope to write a blog post in the coming weeks about it.
Elsewhere, there has been heated debate, possibly now deleted, about the sending of the SAME first letter (variation only with the appropriate recipient name in the greetings and salutation, and date) no matter who they are sending to. There are also people who send the SAME continuing letters to people no matter who they are with no response to items raised by those getting the reply. I like to call these NEWSLETTERS although others refer to them as FORM letters. Form letters are more often-than-not typed (copy and paste, or just fill in the form to add a name & date), and so many people do not want typed correspondence for fear it is not written especially for them.