Yes, they are. Limits are set by our customers and we need to follow them strictly. One of the main reasons we are among leaders in online freelance writing is that we run a policy of meeting deadlines as the most important one. And this is what awaits you – if you take an assignment, you should make it on time. We assume that force-majeure is possible, in which case you should contact a manager immediately and he will re-assign your task to another writer. But this is an emergency, like an extra-parachute, and you’d better not use it more than once.