I am just a Marscoin enthusiast (I am very interested in Mars Colonisation etc) and I run a mining pool.

But Marscoin had donated 500,000 coins to the Mars Society, and another 500k to the Mars One initiatve.   Not sure if these organisations still have their private keys.. but at the time I wrote this message those donations would be worth up to $35000 USD.

Best way to help is to simply use the coin for something.   Keep it active.  The more its value goes up, the more those donations to Mars One and the Mars Society count for.   You could also donate to the coin addresses for mars one or Mars Society.
Cryptopia has a market place where you can list goods/services in any altcoin you like.. maybe sell some spacey stuff in Marscoin ?

I personally hope to build a shopping website working entirely in Marscoin eventually.. but that is slow progress when I have other jobs to complete.

Lennart Lopin; one of the Marscoin foundation creators  and one of the Mars one Finalists, has a twitter if you want to hit him up with some questions.  Marscoin also has a facebook although are a little slower answering.

As far as roadmaps go - not sure - it was created for use as a currency for the Mars Colonies.   The final Mars One crew were going to setup a node on Mars.   The general idea was use as a research credit system.    Eg, a university on Earth could rent an hour on a Mars rover built and remotely operated on Mars..  or colonists could use it to buy/sell items or experiments to be added to supply missions to Mars or specimen return missions etc..

It was always going to be a long haul coin as Mars exploration is on a timetable of years not days.