I'm planning to write an automated tool that will get some informations about a service being sold on auctions sites and send an email to the owner of the website to ask if he wants to also post on my service.
I looked for words like "scraping" and "crawl" in their Terms of Service and Policies to verify if there were some interdiction about it and didn't find them.
Moreover, I won't steal the data, but ask the customer if he wants to post the same data on my service. So the user will have to submit a (pre-filled) form in order to submit his domain on my service.
But still, I'm wondering if I'm allowed to do that. Moreover, is it possible that the auction service can sue me directly or will they first send me a cease and desist letter?
Thank you for your help.