I see many pins with the same images, that has thousands repins. But why Pinterest don’t ban these pins which has not original pics? Also I see alot pins which promote strange urls (catalog, shops,). Interesting why Pinterest don’t ban it?
Can u show example? Soon or later the pin can be deleted, maybe they know how to stay under radar. Maybe if you change MD5 of the pic like on IG they have no way to detect it until someone report it.
There are a lot examples. pinterest.com/pin/462744930442165104/ Pic about legs training but article about something else. Maybe in fitness niche you can do it - use not unique pics.