The are 2 possible scenarios..the first being that the wheels are about to fall off as you said....the other is that there is no longer any need for these guys to be there.
LinQ are barely a substantial holder anymore since their forced selldown earlier this year, and Hing was only there to protect Glencore's interests when they loaned MRX $10mill to get production happening...the debt has now been reduced by a little over half and cash at hand plus the $3mill on the way from DYL would cover any liability to Glencore, so maybe they no longer see any reason to keep their man on the board.
However... two board members in two days is more than a little sus. A phone call to the company on Monday is in order I think.
MRX Price at posting:
$1.15 Sentiment: Hold Disclosure: Held