Karma an app built on the eos blockchain actually suffered something similar a while back, users were complaining of not able to perform activities due to their low staked cpu and net, it seems they later found a way around it.

The above should come really useful not just for account creation but to users who are not able to perform or limited to the amount of transactions they can perform daily.

I once saw a user who was unable to edit a steemhunt post after he found a mistake with the post, this was caused by low RC.

The above sure looks and sound nice, hope the next update will have something similar