Explain best practices for GH / OH sponsorship

1. Document how to donate in order to avoid excess credit card or transaction fees.
2. Modify the Sponsor page on the website.

With OSC there is no card processing fee...? But there is a host fee. This is the preferred option [ in most cases ].

General guidance for org sponsorship on GH: Use invoice billing or credit card balance. Please avoid credit card billing.
- If payment is deducted from an existing GH account credit balance, no credit card processing fee is applied.
- For an organisation sponsorship, the standard structure is:
- 3% GH service fee
- 3% credit card processing fee (if card is used)