Chess Mentor & tactics training was the reason I pony-ed up for a paid membership. Have raised my online rating about 200 pts since. Not sure if it was the mentor or tactics though.
And yes it is generous, but I manipulate it by solving all the easy lessons.
Current points I usually get➡
1300 rated problem and under ➡ 0 points for right answer & -3 up to -12 for wrong
1400-1500 ➡ +1 to +3 for right answer & -1 to -3 for wrong answer
1500-1700➡ +3 to +10 for right & -1 to -3 for wrong
1700+➡ +5 to +15 for right & 0 to -3 for wrong

James 1011 why don't you just keep getting wrong answers until your rating is accurate?
P.s. Nobody else equates chess mentor rating to actual chess rating.