Update our terms pertaining to Braintree

Borrow language from https://www.braintreepayments.com/legal/marketplace
(which we're not actually subject to because we don't have a marketplace
account).

www/about/policies/terms-of-service.md

@@ -220,15 +220,12 @@ responsible for the activity.
 
 1. Gratipay's Service Providers
 
-  1. Gratipay uses Pound Payments Inc., Braintree Payments as a third
-     party service provider for payment services (e.g. card acceptance,
-merchant settlement, and related services). By making use of some or all of
-these payment services on Gratipay you agree to be bound by Braintree's [Braintree Payment Services Agreement](https://www.braintreepayments.com/legal/payment-services-agreement) and [privacy
-policy](https://www.paypal.com/us/webapps/mpp/ua/privacy-full), and hereby consent and
-authorize us to delegate the authorizations and share the information you
-provide to us with Braintree to the extent required to provide the payment
-services to you.  Braintree may also be contacted directly for payments support
-either by email at [email protected] or by phone at +1 (877) 434-2894.
+  1. Gratipay uses Braintree, a division of PayPal, Inc. ("Braintree") for
+     payment processing services. By using the Braintree payment processing
+services you agree to the [Braintree Payment Services
+Agreement](https://www.braintreepayments.com/legal/payment-services-agreement),
+and the applicable [bank
+agreement](https://www.braintreepayments.com/legal/bank-agreement-us).
 
 1. Nonprofits and Charities using Gratipay
 

www/about/policies/terms-of-service.spt

@@ -238,15 +238,15 @@ responsible for the activity.</li>
 <li><p>Gratipay&#39;s Service Providers</p>
 
 <ol>
-<li>Gratipay uses Pound Payments Inc., Braintree (&ldquo;Braintree&rdquo;) as a third
-party service provider for payment services (e.g. card acceptance,
-merchant settlement, and related services). By making use of some or all of
-these payment services on Gratipay you agree to be bound by Braintree&#39;s <a href="https://www.braintreepayments.com/legal/payment-services-agreement">Braintree Payment Services Agreement</a> and <a href="https://www.paypal.com/us/webapps/mpp/ua/privacy-full">privacy
-policy</a>, and hereby consent and
-authorize us to delegate the authorizations and share the information you
-provide to us with Braintree to the extent required to provide the payment
-services to you.  Braintree may also be contacted directly for payments support
-either by email at <a href="[email protected]">[email protected]</a> or by phone at +1 (877) 434-2894.</li>
+
+<li>Gratipay uses Braintree, a division of PayPal, Inc.
+(&ldquo;Braintree&rdquo;) for payment processing services. By using the
+Braintree payment processing services you agree to the <a
+    href="https://www.braintreepayments.com/legal/payment-services-agreement">Braintree
+    Payment Services Agreement</a>, and the applicable <a
+    href="https://www.braintreepayments.com/legal/bank-agreement-us">bank
+    agreement</a>.</li>
+
 </ol></li>
 <li><p>Nonprofits and Charities using Gratipay</p>