Here's the Beeminder twitter account, earlier this month giving a link to their response to this exact question: https://twitter.com/bmndr/status/1169303739657

Here's the Beeminder twitter account, earlier this month giving a link to their response to this exact question: https://twitter.com/bmndr/status/1169303739657682944 https://twitter.com/bmndr/status/1169303739657682944 (tl;dr: they don't agree that announcing your goals makes you less likely to accomplish them. Which should not be surprising, to anyone who has already heard of Beeminder.)