I've been posting questions and getting answers. Some of the answerers, if their answer is not acceptable or not good, then after a few moments I find their answer deleted. Does this technique save our points?
If an answer is deleted, all upvote or downvote reputation is restored.
Upvotes on comments do not increase reputation.
Update: As noted here, posts that have been visible on the site for at least 60 days and have a score ≥ 3 will not decrease reputation if they're deleted. Reason?
In fast-changing professions, there should be no shame in contributing valuable information just because it eventually goes out of date – and there shouldn’t be a penalty for deleting it when it does. Naturally, editing to bring an answer up-to-date is preferable – but if someone else already posted a good answer with current information, you should be able to remove yours and keep the reward for the time it was useful.