1)Will I have all the data about all the members on my site ?? and wher will i find it ??

2) If i install it on my personal domain .. in case i dont like it .. can i uninstall Oxwall 

3) as an admin , will i be able to manage or edit the registration form ??? as in i want to add "Which company do u work ?"

4) after some traffic on my site , will i be able to earn something by placing ads of my other clients ??

I would request you to answer some of my queries ..

Thanks in advance , your help will be really appreciated !!