When I was in college, online dating was getting popular and tinder had recently come out. I met one guy through the app and we texted/called/emailed for a couple of weeks. I never met him in person and for all I know it could have been a 45 year old woman I was chatting with. However, he wrote a letter to my future spouse about me and how I was kind and selfless, it was a full page letter and I still read it from time to time when I'm feeling down about myself or trying to climb out of a depressive episode. It's one of the most genuine letters I've ever received and I still cherish it and cry a little when I read it, over a decade later.
I profusely thanked him at the time and tried to get back in touch and thank him years later after our conversations faded out but I never heard back.
I received the alert it was available and downloaded it right away, so happy to be back on Sync!