Other ideas are turn the kudos points into general points that can either be earned like now, or purchased if you want one of their benefits more quickly. That's similar to how some facebook games work, increasingly one can buy advantages other than content. Also establish a gifting process, so that grannies can buy points for a member to spend on what they want.
I've been playing FB games a lot lately since I can't play sims cause my main computer is currently being used for a job I'm doing (long story).
Anyway,
Every time I see all the "premium" items that can only be bought with the special app money (which usually costs real money), I'm reminded of paysites. Then my piratey side always kicks in and refuses to pay real money for play money. I would rather earn stuff through playing the game, not simply buying pixels because I'm too lazy to earn them. What's the fun in that?
My granddad got annoyed at fb because a farm game wanted him to pay for fuel for his newly bought tractor with real money. He'd just saved up all his free tokens to buy it as well! Like wth, upsetting old people - ruining the comfort of their old age? I used to play habbo, when I was about 12. A good number of years ago now. And I did at one point pay for membership. So I could have pretty plaits and an eyepatch (!!!) and everyone gave me respect. I was the first female habbo army leader - and what did I gain out of all that crap - oh yeah, I lost ££££s. Damn them money-sucking pixel prickheads.