Hi toonholechris and welcome to Snapzu!
To answer your question, there is no difference between linking your own content vs someone else's content because at the end of the day, both scenarios are considered a link snap (a link to content hosted elsewhere).
What you can do however is create the content(like you would do for your own site), and host it directly on Snapzu by creating native snaps containing said content and then giving yourself a link within the native snap to your website. You can do this by using the source function to give yourself credit as the original creator. If you're hosting something as simple to share as a comic, creating a native snap by uploading a single image (or multiple images for that matter) is not a time consuming task. I would imagine the most labor intensive work was to think up the idea, sketch out the comic and then bring it to life.
As for throttling, we don't do any of that, all snaps are treated equally when it comes to votes.