Nate Weiner of Pocket:
> We have a strong relationship with Twitter so we reached out to their team for further clarification. We’ve been told that the new API guidelines are not intended to affect or hamper your ability to integrate Pocket with Twitter apps or clients. The ‘social actions’ refer to Twitter’s own actions like Fav, RT, and Reply.
One would have to assume that the same is true for Instapaper as well. If that is the case, that is good news. Of course, Twitter has made it clear than they can change the rules any time they feel like it.