Reported: Completing quests pays money but no experience and no Contribution Points.
Found: Two separate things.
The experience half is the game's own quest data. In RF Online 1.5's quest table, none of the class quest chains a new character starts with carries an experience reward; some of those quests pay money and Contribution Points instead. Other quests in the table do carry experience, and the server grants it when they are completed.
The Contribution Points half is a server defect. Points a quest pays are added to the character and saved, and the new total is sent when the quest pays. But the server never gives the saved total back to the game client at login: every login reports 0. The second contribution update it sends at login is always 0 as well, and it is not sent again when a quest pays. So points are earned and stored while the client can go on showing zero.
Planned fix: Send the saved Contribution Point total to the client at login, and send both contribution updates with the real total each time a quest pays. Work on it is starting.
To verify: Once the fix ships, note the Contribution Points shown, complete a quest that pays contribution (the second quest of the Warrior starter chain pays 150, in all three races), and check the number rises by that amount, then log out and back in and check it is still there.