Online marketplace eBay incorporated additional buying signals such as "Add to Watchlist," "Make Offer," and "Add to Cart" into its machine learning model to improve the relevance of recommended ad listings, based on the initial items searched for. Chen Xue goes into great detail in this recent article. EBay's Promoted Listings Standard (PLS) is a paid option for sellers. With one option, PLSIM, eBay's recommendation engines suggest sponsored items similar to something a potential buyer just clicked on. The PLSIM is paid on a CPA model (the seller pays eBay only when a sale is made) so that can be very motivating in terms of creating the most effective model to promote the best listings.

We present a novel negotiation protocol to facilitate energy exchange between off-grid homes that are equipped with renewable energy generation and electricity storage. Our protocol imposes restrictions over negotiation such that it reduces the complex interdependent multi-issue negotiation to one where agents have a strategy profile in subgame perfect Nash equilibrium. We show that our negotiation protocol is tractable, concurrent, scalable and leads to Pareto-optimal outcomes in a decentralised manner. We empirically evaluate our protocol and show that, in this instance, a society of agents can (i) improve the overall utilities by 14% and (ii) reduce their overall use of the batteries by 37%.