What is the ruling on working or earning from the internet through the following methods: watching advertisements, collecting cryptocurrencies such as Bitcoin (whether manually or automatically), randomly answering surveys, inviting others to subscribe to these websites, and displaying advertisements on a YouTube channel?

Earning through watching advertisements varies in its ruling depending on the advertisements themselves. If an advertisement promotes something permissible, then there is no harm in earning from watching it. However, if it contains an impermissible religious matter, one should avoid it. As for an advertisement that promotes something forbidden, it is not permissible to earn from watching it.