I see you've already started a previous thread. Looks like you already got the answers you wanted. https://www.backyardchickens.com/threads/hatchery-questions.1512363/
What are you ordering? I don't have much experience with hatcheries, but surely there are threads from the past asking the same question. Doing a search on the BYC search function may shed some light.
Definitely not a scam. A very well known hatchery which a lot of members use very regularly. I prefer to get chicks from local breeders though to avoid shipping. Just a personal preference.