31 January 2019, 11:40
HannayTest of Amazon Prime Photo hosting (fail)
This is just a preliminary test.  I'm not sure if the link I get from Amazon is persistent, or for that matter if Amazon allows this type of usage, but thought it was worth a try.  It seems to work, though I had to resize the photo myself.  And, I have no idea yet whether this would help solve the problems when posting from a phone or tablet. 
 
     For what it's worth, I uploaded the photo to Amazon Prime photo storage, viewed the photo, then in my desktop web browser (Firefox), I right clicked on the photo and chose "Copy image location", then pasted that link in with the image button.
31 January 2019, 20:15
Hannayquote:
I cannot see it. 
Neither can I see it anymore.  Apparently the link was only persistent for a short while.  I had hoped that, being a paid service, it might allow me to host photos that could be directly embedded.  Apparently not.