The Road to Hell is Paved With Hugh Jackman's Letter of Intent. There really is no benefit to seeking letters of intent from actors (or their reps). Producers hate asking for them, reps hate writing them, and financiers ignore them. They're usually out of date. They're not binding, nor are they conditional to anything that's relevant. And yet, they still rampantly persist within indie producing and packaging.
LOI is used as manipulation tool at the hands of unscrupulous sellers & agents. Often times, obscure or scam_oriented persons who claim to be crude Sellers, or represent themselves as sellers' agents, mandates or brokers largely by an Internet contact or communication, employ the LOI merely as a tool to quickly "corner and box in" a prospective buyer to a purchase deal, before the prospective buyer may demand that they provide their business profile or show him something tangible to demonstrate that they are truly legitimate sellers.