2) Would be interesting to know how tech savvy are these people are and how much they trust you :D since usually you should check the link source to initially evaluate the potentially risk of a link. Btw, no links are virus if you don't deeply interact with the page (download and isntall something).
Finally, we are talking about the homepage here, not an internal link with the “strange” url.

5) I didn't say this is explained in the screenshot, I said it's on the page, and I said I think users are inclined to scroll on mobile. Of course the first view has to send a strong signal, and since different people are sensitive to different messages, Njump has an animation that alternates between various phrases that can “hit” the target audience.