This market resolves to the number of members of Hack Club who are known to have joined Manifold by April 1, 2026.

A user will be counted if they have a Hack Club Slack account, and their Manifold account can be matched with reasonable confidence to their Slack account, usually by matching usernames. I may ask them for confirmation if I am uncertain or if they are suspected of market manipulation. However, a user who has a Hack Club Slack account but didn't before they were 18 may not be counted (one example is @NickyCase)

Hack Clubbers do not need to be under 18 to be counted in this market. That means alumni are also counted.

To simplify resolution, I will only consider users mentioned in the comments or ones I have verified myself.

Due to the partially subjective criteria, I will not bet on this market.

List of Hack Clubbers who have joined Manifold so far (not guaranteed to be exhaustive): @khang2009, @Firepup650, @EndofTimee, @EternalNightfall, @gbtsui, @Jooooooooosh, @jollyroger182, @astracelestine, @Gizzy, @SahanaDoodekula, @TomD, @AdrianTennies, @LennyKay, @NovaHarrington, @sadeshmukh, @Charmunk, @JeninHenin, @MateisHomePage, @SamhithPola, @ScooterY, @Shuflduf, @ShymikeMC, @KieranKlukas, @cyteon, @MahadKalam, @junya, @bohaska, @fish3123123, @AidenBohlander, @paperclip, @Christianl56h, @SofiaEgan, @LucasAltamirano, @m0hid, @Lenny9tIcI