Thanks Gloria you have helped me make a decision.
I don't have twitter on my phone - I log in on through my pc usually once a day. I used to enjoy reading what people were up to, and tweeted or retweeted things I hoped my followers would be interested in reading.
Now my feed is filled with hundreds of automated tweets and retweets of listing promotions, to the extent that I rarely click on any of them. Looking at my own shop stats, real views from t.co are way down, so I guess my followers are feeling the same way.
So I've decided this is not for me. Over the next few weeks I will have a purge: I will only follow those who have something interesting to say. An occasional promotion is ok, just not 20 times a day :)
I don't mind if that means I lose followers - I'd rather only have those who are interested in what I have to say as well.
All the very best to you all, and I hope your Etsy shops do well.