With recent updates to Soapbox, you can choose to display a list of supporters of a peer-to-peer fundraising campaign, both to recognize their generosity and to offer social proof that the cause is worth supporting. Donors can also be allowed to share a comment explaining why they are supporting the cause that will be displayed along with details of their donation. And, to safeguard privacy, a given supporter can mark their donation as anonymous so their name is not displayed on the public list of supporters.
For more details on enabling the Supporters list, check out this article. For more on enabling commenting, this article should do nicely.