Malone? Anything I told you would be a complete guess. Wealthy guys like Malone have "people" who watch that stuff for them. I am willing to bet his "people" would have nixed any deal he was doing on his own with D&D Displays in the first place and I doubt he ever had much if anything to do with it from the very beginning.
My suspicions are that Brown approached Malone's people through a mutual contact or maybe even the attorney that eventually took him public before Expo Holdings was formed, said he was looking to get some wealthy investors in on the "ground floor" of D&D Displays and promised them a profit. I remember reading that Malone was an "early (silent) investor in D&D Displays" or something like that indicating that perhaps his 125 million shares were a conversion to EXPH stock from that disaster and that Brown and Harrs were obligated to rescue him from the massive losses at D&D just as they did themselves. The attorney probably made an offer of some sort of quick profit for the use of Malone's name in the newly formed public company. Malone's people looked at what was probably a guaranteed quick $250K stock flip instead of a loss, said yes and were gone on the first P&D in 2008 right after they offered him what was probably a desperation position on the BOD to keep him from bailing. I doubt Malone ever even heard about Expo Holdings unless he had to sign off on the deal during a business meeting and probably couldn't tell you who they are if you asked right now. Just another piece of paper he signed in a big stack of other papers. From the little I know of Malone from the media however, he is pretty community minded and gives a lot of money and his time to charity. So while he might be pragmatic about the profit he made on his EXPH stock investment (if that's the actual case), I should think he would be disgusted to know he was ever associated with a despicable scumbag like Brown. All IMHO.