I have no opinion on this. But I would like to point out that the most of the opinions in other Answers are at odds with what is said here: http://meta.softwarerecs.stackexchange.com/questions/44/are-web-service-recommendations-off-topicAre web service recommendations off-topic?
If you want to make a distinction between
- hosting service recommendations - off-topic
and
- web service recommendations - on-topic
then there need to be a COHERENT explanation of where you draw the line and why.
Saying that Github and Dropbox are "applications" or "webapps" is circular logic. Github is BOTH an application AND a service, and in reality web hosting services are likewise BOTH applications AND services.
So that distinction boils down to an arbitrary assignment of vaguely defined labels.