That is all.
That thread hasn't actually been all that helpful for a while.This topic
may answer the question you are asking. Besides what was said in there, you can use your psybucks to buy lottery tickets in hopes of winning additional psybucks. In the past there was an official shop where you could buy things like custom ranks or larger avatar sizes but the shop was very expensive. Otherwise I remember guys like Sneaky Sneasel hosting games with psybucks prizes but he hasn't been on in a long time.
And what it all comes down to
is that everything's gonna be quite alright