What is the ruling on marketing pages on the internet (such as websites for booking flights and hotels, and pages for selling various goods) on my own page and website, and taking a commission for that? Is this commission permissible or forbidden?

It is permissible to market electronic pages for a known commission, provided that these pages belong to websites engaged in permissible activities. As for pages related to forbidden activities, or those predominantly forbidden, it is not lawful to market them or to take a commission for them.