This is probably the most motivational out of all the rewards. However I do not think it’s actually possible to earn it. Currently, if one purchases the largest membership the maximum amount of sweat coin you can earn each month is 600. In order to earn this prize you have to earn 20,000 sweat coin within a 24 month period . So let’s do the math. 24×600= 14,400. And this is not accounting for the fact that you would still have to pay 30 sweat coin a month in membership fees. They seem to include friend invites in this calculation, however in order to earn enough sweat coin to make up the difference between 20,000 and the 14,400 you would have to invite over 1100 friends. I don’t know about you, but I don’t even think I know that many people personally, let alone have that many friends.
I think it’s really cruel to offer an unattainable prize. One shouldn’t dangle a carrot as motivation, and then fail to reward the person afterwards.
Please set realistic goals and rewards for users.