Verrrrry interesting. That's the first time I've ever come across that counter-intuitive advice. It would be psychologically difficult for me to delete my accounts on FB and Twitter. I use IG for just fun pics for friends and really FB is for "friends" as well - I don't normally post publicly. I will admit though that Twitter is terribly frustrating: I have about 10.7 thousand "followers" but each tweet gets about 11 impressions and zero to one like (outside of me clicking like on my own tweets). So... I'll think about it.