Yes. One would be the need for checking of web sites linked in comments. Some of them might be phishing scams while others may not be related to the topic or not work, simply resulting in long spammy comments that don't bring any value to the question. The other would be repeated questions or questions asked with other words having the same topic. If a certain topic is already tackled in the same day I don't see the point to reward the same question rephrased.