To see the list of people who have subscribed to your Crowdfunding page, please go to the Campaigns page. Then, click on the campaign's name:
On the next page, click on "subscriptions":
You'll be able to see the number of donors who have subscribed. You can also see the names and emails. Additionally, you'll have the button "unsubscribe". You can use this button if a donor wants to stop getting the campaign updates.