Simply visit the Donation page (see Donation's How-To section for more details). Each slot costs 5-10 USD per month (longer durations receive larger discounts). Users may choose to adopt multiple slots; availability is unlimited.
For each month paid users receive the following per slot per day:
- ~15 Hath
- ~3,000-4,000 GP
- Work done by a server slot (generally a hitrate of ~50) counts towards the adopter's H@H toplist position, free archive quota (bonus +500 MB/day per slot), and mod power calculation