You are simply copying the wrong code at PB. That is a link to the PB homepage, not your pix album
Use your phones browser, log in to a PB account in a new tab
Click the pix you want to post
Click the SHARE button and click the GET LINKS choice
Once the links appear, copy the IMG Code.
Paste that code into a post
Iboats limits pix size because content would swell to an infinitely large size, just to host pix. Iboats isnt a pix host, its a boat resource that is aided by pix. Pix loading is significantly slower then text (even w heavy fornatting), which would then also needlessly tie up network resources from me on my phone sitting on the couch, thru my modem, ISP, my ISPs network, the transmisssion lines, to the Iboats ISP, network and Iboats servers.
W 100s of thousands of members, and millions of topics, much of it surfable w out joining, tying up resources to host large format pix isnt going to happen.
Even old, small cellphone cameras take large MB pix
I use PB to host hundreds of pix I post across multiple forums, it works w all of them w little effort. And have done so for nearly 5yrs.
READ the info at the link Watermann posted above OR follow the method I outlined in the post. It works, and works well