I'm just your average web dev, but the Cameo site seems to send a lot of unnecessary information on pages. E.g. the request that fetches recent public videos m

I'm just your average web dev, but the Cameo site seems to send a lot of unnecessary information on pages. E.g. the request that fetches recent public videos made by someone seems to include the price paid... because, why? Reviews include the original order id... because, why? This just seems to be asking for trouble. Is this how most AJAX-heavy sites work?