Why are graphic-text so common in WSOs now?

I have begun to notice more and more WSOs where the offer is actually one or more long pictures of both the text and the graphics.

Is there a logical reason for doing this?

I have seen the headline text published as a graphic many time, but now I am seeing entire WSOs being published as graphics and very few lines of real text. The other day I came across one that took 10 minutes to load! (I get 6-22 MBps Download speed on my broadband!) When I tried to highlight part of the text, it revealed that there was one really long, I mean 6+ pages of text/graphics in one picture. This picture was made up primarily of text. There were at least 3 pictures of similar length!

While that was an example of the extreme, I am still seeing quite a few, much shorter WSOs, where almost all the text is just a part of the graphic.

I can guess a few reasons: so someone can't steal the copyrighted work. So someone else can't tell their copyrighted work was stolen and used. So one can make changes to their WSO without raising red flags at WF. Or so they can change the terms of their WSO to their customers even after the sale.

I once bought a product with "unlimited PLR" rights, but by the time all the changes were made to the WSO after I bought the product, it barely had resell rights. I had made a copy of the WSO offer to keep with the product as justification for using the full rights I purchased. If I had only linked to the graphics text, then I would not have evidence of my rights today.

I am really concerned about the use of graphics where text is more efficient.

Should I be?