This does sound like a very nice initiative @sumatranate. We can all use a little kindness and remembrance in life.

As I recall, someone ran a "semi-bot" for a while that posted a list of every active account's anniversaries every day, and then would leave them a little greeting on one of their posts. I think it stopped when they reached the point where it was the anniversary of thousands of people having joined on a particular day.

This kind of opt-in program might be nice.

Bright Blessings!