Legitimate site is any site that is operating legally following the rules and regulations strictly especially to adsence if it is a monetize site. It is very possible for a site be legitimate and not paying, it also possible for a site be paying, in the long run such site stop paying with an understanding reasons and such site ensure it doesn't owe any eligible members before it stops paying and it will still operate normally but without reward, for instance foru for you is a legitimate site but currently not paying members and it doesn't owe any member before it stopped paying.
Answeree is a legitimate site and it also paying the eligible members, I have not recieved payment but I have seen payment proofs from the site and I am optimistic I will be paid soonest.