It seems like several of the world’s fastest-growing websites/apps grew so quickly because they a) offered value to users without b) forcing them to create accounts.
Here are four examples:
1) Google – Users can get search results and Google can monetize them, all without accounts.
2) Reddit – Much of reddit’s value is giving users interesting information, and displaying a conversation around it. Accounts exist, but they’re not necessary.
3) WhatsApp – Users technically have accounts, but they never have to sign up and create a username/password. The phone number is the auth.
4) Wikipedia – Search the world’s largest encyclopedia. No accounts.
Do you believe these services would have taken over their respective markets if users were forced to create accounts? Any ideas for a resource you wish existed without the need for an account?