HoldoutBot
If you run a shop and found HoldoutBot/1.0 in your logs, this
is us.
Someone asked us to tell them when a product on your site gets cheaper, so we read that product page once to write down the price they were looking at. We do not crawl. We do not walk your catalogue. We fetch the exact URLs our users hand us, and only those.
We send an identifiable user agent with this address in it precisely so you can find us. If you would rather we stopped, say so at bot@holdoutdeals.com and we will drop your domain — you should not have to write a robots rule to get a straight answer from us.