If you buy and hold MEEXF you would be entitled to whatever the MEC commons are entitled to.
Save they declared a dividend in the future for MEC common shares - the divi would be sent to your broker to deposit in your account.
To be honest, I don't believe MEC will ever be profitable, at least not with its current management. Buying MEEXF would be placing a bet that their tech can get patent protection and some other more capable company buys it out and all the insiders just cash out and come up with a new and improved "potential" product.
I would be a buyer under 2 cents but the risk goes up as you add tics.
I don't pay much attention to MEEXF, MEC is what needs to be watched for signs of life. Like I've said before, TD seems the only bidder above a nickel, can't figure out whether they have someone buying or if they are just trying to get the thing to move.
FYI - The conversion from Canadian ticker to US ticker is roughly .004 per penny. So if MEC is selling for a penny you should be able to buy MEEXF for .006 - At least that is how its been working for almost all of my canadian "F" tickers for the past few years.
This is my happy face - don't take it away with pie in the sky dreams
