Is the method mentioned in the link (www.tunisia-sat.com/vb/showthread.php?t=2260140) for earning money from the internet permissible (halal), and if not, are there other permissible (halal) ways to earn profit online?

We are unable to browse the aforementioned website due to our engagements. The fundamental principle is that the inquirer should send the method and nature of the transaction for a ruling to be issued. We cannot guide you to legitimate ways of earning from the internet due to our lack of knowledge of a fixed transaction, as transactions vary. You can search for earning methods, and if you find a method, explain its nature to obtain a Sharia ruling.