Ever since I launched Tweetfave in 2013, it’s been quietly working away and slowly growing. (For some more of the background, see Brief History of Tweetfave.) An update on the numbers so far: Over 200 users have tried the service, with over 100 still active Over 240,000 favorite tweets have been marked and emailed Here’s a growth chart which shows the tweet count growing at a steady rate ever since we went live. The rate of new users cooled off after that first year but is still growing by a few each month. The growth has basically been some word-of-mouth…