What is the ruling on participating in an online financial competition that requires making the website's page the homepage and registering to enter the draw?

It is permissible to make one of the websites a homepage in the internet browser to support it financially and morally, whether for free or for a fee, provided that the content and advertisements of the website are free from any Sharia prohibitions. It is forbidden to do so if the website promotes disobedience or contains forbidden things, such as prohibited entertainment venues or usurious banks. If the support is for a fee, it is stipulated that the fee must be known.