Always worth joining, it costs nothing but a moment to check, it on occasion gets some really tasty tasks, although few and far between, i hadnt accessed it for about 4 months and found i had money in it that i totally forgot about... so yeah, it costs nowt and you CAN make money from it, but just be sure to read thru tasks to understand them, like this phone call one, it is very easy to think oh yeah, money for a few words down a phone line..... do 100 times that with mum at night!! but this is very costly unless you are on a German unlimited phone call contract really