Capchas are often hidden, only bothering the user when they’re not suspected to be a human. Popularity might also play a role. I’ve personally never heard of Runbox, maybe they’re not big enough to attract bots? Also possible that they’re a paid email provider?
Capchas are often hidden, only bothering the user when they’re not suspected to be a human. Popularity might also play a role. I’ve personally never heard of Runbox, maybe they’re not big enough to attract bots? Also possible that they’re a paid email provider?