Well, the link is for the card(s by r4ids.cn). It's probably even directly from their website (through the web archive). Nothing to worry about.
The links are dead since 2 months or something because filetrip went down. Yes, the manufacturer should update them but the fact that the links went down isn't really the fault of them. The DS mode of the latest card from the team, the r4i gold 3ds plus from 2017 I think, runs on the same (or similar) hardware.
There simply is no update required. It works on the latest 3DS version (if it's not from the faulty batch) and it's compatibility with games is top notch.