[The total number of GWWC members on January 1, 2018, is] Between 5,000 and 7,500 (2x–3x growth)

Created by OpenPhilUnofficial on 2017-08-30; known on 2020-01-01; judged wrong by peter_hurford on 2020-01-26.

• OpenPhilUnofficial estimated 17% on 2017-08-30
• Pablo estimated 5% on 2017-08-30
• peter_hurford estimated 2% on 2017-08-31
• themusicgod1 estimated 25% on 2017-08-31
• Michael Dickens estimated 10% and said “I’m surprised that OP’s prediction is so high. Updating somewhat upward on that basis” on 2017-10-28
• peter_hurford said “Per https://www.givingwhatwecan.org/about-us/members/ there were 3334 GWWC members on 1 Jan 2018. This resolves incorrect.” on 2020-01-26
• peter_hurford   judged this prediction wrong on 2020-01-26.