Maybe we are too small but Datadog is one of the few vendors which we haven't been able to negotiate down in years. The price has always been whats on the website. I honestly don't even mind, with some vendors it feels like you are on a basar and they always tell you that their final discountns had to get approval by the CEO.
We spend a few thousand a month with Datadog and our account manager reaches out every quarter to adjust our monthly commit up/down which provides a 20% discount (I think) or so off from the website prices.
Compared to most Enterprise vendors it is a lot harder to get a discount from Datadog. Most vendors will give you 1/3 off just for signing a contract and committing to a spend, Datadog is not like that.