What is the ruling on subscribing to an American advertising and publicity website that grants $25 upon registration and $10 daily, with the possibility of withdrawing earnings upon reaching $300? And is this considered permissible (halal)?

It is permissible to subscribe to the website and read advertisements for money, provided that the advertisements are for permissible things. However, if the website is in a Western country and contains advertisements for forbidden things such as nightclubs, alcohol, and usurious banks, then participation in it is not permissible, because the subscriber will be contributing to the promotion of forbidden activities.