Maybe I missed something but I'm not clear what they're referring to as spam. I guess the fact that the agent emailed all users with discounts and dropped the price a few times? I don't think that's usually what people call spam. (For example if it had emailed everyone once would we call that spam? No. So it's about frequency of price drops?)

They did include a screenshot which looks like at least 6 emails being sent in the 24 hour time window. I would certainly consider that spamming from some diary app on my phone.