The friendster logo, ads, and footer is the main concern of those who check the friendster profiles. If you have time, you can read their notes such as ToS. I know some that their accounts had been suspended because they hide some of the contents in their profiles. It's like this, if you will hide the ads, Friendster staffs might get upset because they depend on ads to earn since they don't ask for donations and payment from their users. If you hide the logo, its kinda rude because its their site and trademark, why need to hide it. And if you hide the footer, the copyrights and the important links to their notes are placed there.