The upgrade for the site was not based on the "ADS"..it was needed in order to keep the site alive.
Try using your browser on your phone instead of the app.
O geez....I can't remember how you found yours either...but I do remember you didn't have a media/photo tab on your profile until you uploaded some new ones...right?
Here is a list of all the thread you posted in.
https://www.backyardchickens.com/search/133538/
Hopefully this can get you on the right track to finding you way around again.
The threads you used to follow are still there...they are called WATCHED THREADS Now.