A better explanation from Photo Bucket:
http://blog.photobucket.com/please-review-latest-changes-photobucket/ I thought this was quite informative:
"2. What is 3rd Party Hosting?
Photobucket defines 3rd party hosting as the action of embedding an image or photo onto another website. For example, using the <img> tag to embed or display a JPEG image from your Photobucket account on another website such as a forum, Etsy, eBay auction listings, a blog, etc."
And:
"3. What users are affected by the changes to our 3rd Party Hosting
policies?
Moving forward, new and legacy free account users will NOT have third party hosting available.
If you were a Plus Account subscriber in good standing as of June 1, 2017, you will continue to have all the privileges you have enjoyed including 3rd Party Hosting until December 31, 2018 as long as you maintain your subscription.
Non Plus 500 Account subscribers that purchased after June 1, 2017 will not have access to 3rd Party Hosting"