There are a few people out there self-dosing with snake venom. The posted article is based on a study on the blood of one of these guys, Tim Friede, who has developed very effective antivenom in his blood after 20 years of self-dosing with a diverse array of snake venoms.
Vice did a few documentaries on Steve Ludwin, who is also self-immunizing. In one of these he answers questions about how he began and his motivation for doing what he does. In addition to producing anti-bodies he also believes that snake venoms have medicinal and anti-ageing properties - but these beliefs do not appear to be supported by any animal-based data as far as I can tell: https://www.youtube.com/watch?v=AcbqB0pFRPA
Self-dosing with snake venom is not something I would recommend. Generally a bad idea. But it is interesting to see the results and to learn about what motivates someone to do something like this.
What gives these morons the idea that literally poisoning yourself is good for anti-ageing?
That's like an alcoholic telling you "it helps me age slower!". Mate, you look 55 - you're only 36.
He didn't do it for anything resembling anti-aging
Edit: oh, just read the last of the post mentioning the dude doing it for anti-aging...yeah, that seems messed up