I don't think the one paragraph in this article where this is mentioned does enough to emphasize this part of the community. Many members of effective altruism use it as a front to recruit people into their belief system, which is centered around devotion to / fear of future AIs that exist solely as thought experiments. And while their leaders don't necessarily explicitly endorse it, the communities they foster tend to also be fairly right wing / race realist / misoginistic / bigoted.
Many of the people in the rationalist and effective altruist community believe that if they don't help create AI any future AIs will create a hell and punish them in it. Seriously. That is a serious belief.
Check out more: https://rationalwiki.org/wiki/Effective_altruism
http://benjaminrosshoffman.com/effective-altruism-is-self-re...
[1] http://slatestarcodex.com/2018/03/26/book-review-twelve-rule...
[2] https://www.lesswrong.com/posts/3wYTFWY3LKQCnAptN/torture-vs...
[3] https://twitter.com/robinhanson/status/989535565895864320?la...