Ok logged in and checked your root .htaccess file and it was a root .htaccess file for a WordPress single site installation and not a Network / Multisite subdomain root .htaccess file. I would not be surprised if I made this mistake and activated the wrong type of .htaccess file on your site the last time I logged into your site.
I have added additional CSS visual styling in BPS Pro 8.0 that will hopefully make clicking the wrong AutoMagic buttons a problem of the past for me included.
I clicked the correct Network / Multiste subdomain AutoMagic button and activated Root folder BulletProof Mode and your images are displaying correctly on your subdomain subsites now. Logged out of your site now. Please either change this login to a Subscriber Role login or delete this user account. Thanks.