I don't use Gina, so I don't know who has unfollowed. I'm not that bothered as it's their choice and I would still follow them if what the post interests me. I have to keep my feed manageable so I may unfollow people who post a lot. I feel quality is more important than quantity. We really need tools to filter the feel. Steem Plus can do it, but I don't use that feature much. I did worry that lots of people would use Zappl and flood my feed with short updates, but that hasn't happened yet.
I did unfollow a lot of deaf accounts, but I had to check them manually. There are some I hope will come back, so I kept them for now.
I remember that Zapl and all its content, but as you say its all gone away. It was rather short lived, that or the content is no longer filtered to us.
I would not be without Gina now, its one of my essential utilities.