[Ruud-v-A]

The ticket site [1] states:

> We believe in diversity and would like to provide support to people of many different backgrounds. This includes, but is not limited to people who belong to one or more of the following groups: people of color, women, nonbinary and gender non-conforming people, disabled people, people with mental health issues, and LGBTQIA+ people.

[1]: https://diversitytickets.org/events/100

[Manishearth]

Right, this is an awarded scholarship ticket (not "tickets are cheaper for you", this is "apply and you may get a free ticket+travel")

Scholarships are a pretty normal thing wrt conferences.