Advice on scraping tool - SnapMap

i'm working on a tool that scrapes SnapMap and i had a few questions -

Is it normal to scrape media and files from SnapMap? Is it allowed?
If I request to download media from SnapMap will I get blocked? And if so after how many requests?
Does the website detect these requests?
Are there similar websites to SnapMap or any known proxy websites?

All help will be appreciated!
Thanks