Facebook: Applications Aren’t Meant to Be Installed
A bunch of changes in how Facebook apps work for users and developers. Bad times, for sure.
When installation screens go away mid-July, existing applications will see their access to users grandfathered in. Their profile boxes will be moved over to the new tab, their email lists will retain members, and they will still be able to generate news feed items just as before. Thus, the popular apps that achieved success through spammy means won’t suffer nearly as much as nascent apps that have yet to gain a foothold.