Sorry there is no way to donate to this site. The site is owned and payed for by Jelsoft, and is run by volunteers.
You can however make a donation to the author of a hack you like if they have provided information about how they can accept donations. I know a lot of coders do appreciate a donation as a sign that their work is apreciated.
maybe consideration could be given to setting up a central fund where money can go to where it can be distributed according to what vBulletin.org considers suitable, if I would personally like to donate money to an individual hack then I would certainly consider this.
Unfortunately we'd then have the responsibility of handling peoples funds and effectively acting like a bank. I'm not sure of the legal implications of this but i'm pretty sure you need some kind of license to handle funds
i would provide more support for my works and all global requests over vB.org if someone donate for me btw... i need my license renewed... - just a serious joke btw!