is right-click still not working on mangago, or did they relent on prohibiting the right-c...

yep, unfortunately mangago now prevents right-clicking -> saving images (〜￣△￣)〜

Not to mention that the watermarks that are scattered around the pages of the manga are quite annoying.

Yes, right click still not work. But can't be this just an issue, they hadn't solved yet? Somthing's going on the site, new webtoon category, the annoying watermarks, not downloading pictures, black pages, etc.
Raindragon, you are the uploder of Deadlock manga, right? Maybe an uploader asks, the admins answer what's happening. I sent a message, but they didn't answer. Maybe you could be luckier with them.
They don't own any manga here, so they don't have the right to prevent users save them just for own using. I hope they know it.

Do they now? What about screenshots? People who try to stop others from saving images don't think about this. I can just screenshot, crop, and it's mine, and I can remove the watermarks. What now?

Yeah, I'm the Deadlock person. thank you so much for noticing! If you're on Chrome there are two extensions you can get. one is "RighttoClick" the other is called, "pumpkin something." Pumpkin works. I can still right click and use the context menu. I don't think sites should put in code that prohibits saving images. It's not just saving images, they're costing us a whole menu of options we need. print, view page source... "open link in new tab" was a huge loss for me. So I researched around and found extensions so I still have my right click menu. let me see if I have that link around here in my toy box. https://chrome.google.com/webstore/detail/pumpkin-right-click-enabl/linjodakmnamlieknafoiphnckgbaeab?hl=en-US

screenshots are so much more work that right-click, ya know?