(S)he's talking about if you rely on an API/Third Party service over hosting.
You can packup your application and move it to Amazon/Rackspace/DigitalOcean, but if you use Facebook login exclusively or use a third party API for a core service and they decide to change (as GP suggests), you're fucked.
You can packup your application and move it to Amazon/Rackspace/DigitalOcean, but if you use Facebook login exclusively or use a third party API for a core service and they decide to change (as GP suggests), you're fucked.