[qq66]

Having a product disappear while you're using it is more of a risk when you invest a lot of your time into it. If Gmail disappeared with a month's notice, a lot of people would be forced to spend hours or days migrating their data and settings. If Google Search disappeared overnight, people could just use Bing.

This seems fairly transactional and thus fairly low-risk, although on the help provider side there's probably a reputation system which will become meaningless when the product is shut down.