clarify commercial license (#137)

README.md

@@ -89,4 +89,5 @@ Check out our [contributing guide](CONTRIBUTING.md) for more details.
 
 GraphQL Engine is available under the [GNU Affero General Public License v3](https://www.gnu.org/licenses/agpl-3.0.en.html) (AGPL-3.0), the same license as [MongoDB](https://www.mongodb.com/community/licensing). We have written more about what you can and cannot do under AGPL [here](https://github.com/hasura/graphql-engine/wiki/License-Explained).
 
-**Commercial licenses are available on request**. Please feel free to contact us at build@hasura.io or on our [website chat](https://hasura.io).
+**Commercial licenses** that bundle the Hasura GraphQL Engine with support, and SLAs are available on request. Please feel free to contact us at build@hasura.io or on our [website chat](https://hasura.io).
+