Praise be to Allaah.
The ruling on this action
depends on knowing what kind of questions the website is asking the user, so
that we may determine whether it is really benefitting from them and whether
this benefit comes under the heading of what is permissible or not? Or does
it benefit from the user entering or registering on the site, or will it
sell his information to a third party? All of these things happen on the
internet.
If the subject matter of
the questions is permissible, and that will not result in helping the
website in any sinful activity, then there is nothing wrong with answering
the questions and taking the money that the website sends in return.
The same applies to quick
earnings; they may be halaal or may be haraam, depending on the work the
earnings result from.
For more information please
see the answer to question no. 98817
and 101806.
And Allaah knows best.