Buyer is guaranteeing a certain amount of spend with a pub no matter if the campaign is off or not - in exchange for specific inventory which the publisher is guaranteeing you usually at a certain price/within a user group etc.(varies) You can also turn a campaign back on. I’ve had PG deals that were supposed to spend in a month and took 3. I think those types of details vary by deal due to terms agreed upon but you’ll most likely be held to the level of spend you agree to no matter what. However as I mentioned T’s and c’s vary - if the deals absolutely sucks or isn’t what was agreed upon and you can prove it, they can always relieve you - which I’ve done as well. I wouldn’t read too much into what things are named within the digital space. More on reddit.com

Direct IO for formats or cost models not available on PG and if you’re not using a DSP. More on reddit.com

Always PMP if you can. The loss of frequency control and audience targeting on your side shoukd push you towards PMP where you can. An alternative is to send your data (or 3p either your source or request publisher to source) to large network and have them filter audience on their side. Scale is often an issue so expect to supplement with some basic demo etc data from publisher. Frequency is my biggest gripe. No matter what you tell them to set it at, they always get it wrong. Also the management of the PG fees irritates me (TTD shop). More on reddit.com

I would say PMP are a way for publishers to package inventory at an agreed upon price directly with a buyer. Please note this does not block other open market advertisers from bidding on the publisher though. The three main types of deals are Private Auction, Preferred Deals, and Programmatic Guaranteed. You can Google some definitions of these deal types, but generally Private Auction = Floor price. Pub sets the minimum price for the auction and the buyer has the ability to bid up, use bidding algorithms, etc Preferred Deal = fixed price. Agreed upon price is the same for every impression. Programmatic Guaranteed = fixed price. Impressions and flight dates are also agreed upon. This is basically like running a direct buy, but through the programmatic pipes. Setting up a deal is facilitated by the pub in their SSP. You agree on the terms with the pub, then the pub will setup the deal in the SSP and send it to you in the TTD UI using your account’s Seat ID. This feature is standard in most SSPs. The problem with the pub you mention is that they are not using a full fledged SSP, they are only using Adsense, which doesn’t have this functionality. Taboola might. More on reddit.com