My mistake, it seems like it is not possible to make that other one clickable on Steemit blog, only on real websites. I haven't tried if it works through some IM.

Put luckily, it is also possible to copy-paste it to "Chat > Add a new device > Accept invitation..." screen, there is a section about what each link does in my latest post https://steemit.com/byteball/@tarmo888/why-didn-t-byteball-use-the-referral-links-from-the-beginning