Is it permissible to work on foreign websites to earn money online by registering, downloading applications, or watching videos, while avoiding tasks that involve gambling or images of women? And is it permissible to invite friends to register on these websites while warning them against bad tasks? And does the inviter bear sins if the invitee disregards the warning and performs bad tasks?

Permissible work, such as registering, downloading applications, or watching videos for a known fee, is permissible, provided that the videos and applications are free of forbidden content and there is no assistance in it. There is no harm in inviting others to this work, provided it is not known that they will commit forbidden acts. If one of them falls into the forbidden of their own accord after being warned, then the sin is upon them, and this does not affect the earned reward; for Allah Almighty says: "And no bearer of burdens will bear the burden of another," and "O you who have believed, upon you is [the responsibility for] yourselves. Those who have erred will not harm you when you have been guided."