There's something fishy going on right now with one of the major image hosting sites sli.mg .
Lots of users on voat, 4chan etc are complaining that their images have been silently removed.
I dug through my past posts on pizzagate to check the damage, and thanks to steemit's built in caching image proxy all of my post images still work :D
Just another extra perk for steemit users!
Here's a random example of what's being deleted by sli.mg (and saved by steemit)
When viewed via http:
The image is reported missing
http://i.sli.mg/5FsTdm.jpg

When viewed via https:
HTTPS appears to have been disabled on sli.mg
https://i.sli.mg/5FsTdm.jpg

When loaded via steemit image proxy it works fine !
https://img1.steemit.com/0x0/https://i.sli.mg/5FsTdm.jpg

Archive.is has also removed a lot of pages
Archive.is has been used heavily for a lot of the early pizzagate research, and now it seems to by purging its files in response to DMCA requests.
For example:

Lesson : You can't have too many backups
If you're interested, and don't already have a copy of the pizzagate research archive - you can clone the whole thing with this terminal command .
git clone https://gitlab.com/ausbitbank/pizzagate.git
It has many (but not all) of the deleted images, as well as full html copies of heaps of sites and voat posts (that are now gone from archive.is).
An automated voat scraping tool and near complete archive of pizzagate posts can be cloned with this command
git clone https://github.com/pizzascraper/pizzagate-voat-backup.git
Can't stop the signal

Lets connect !
steemit / twitter / gab.ai / keybase