Well, the irony here is that I came to this site because I found THK on e-hentai... but you gotta do what you gotta do.
I came across SJI elsewhere which brought me here.
Maybe officially released earlier stories/strips - with lots of links highlighting where to get later content.
As long as there isn't a major contrast between the watermark and the image its not too bad - its when you have a pale mark on a dark image and it really distracts... It needs to be done, and across the whole image so copiers can't just the mark out (as I've seen on landscape pics elsewhere) - even more so with individual marks so you can link the leak to specific accounts.