MarkON

 Achievements on individual profiles at TruckersMP website.

 It looks like Web Developers and other staff something cooking 

I wonder if it will be something like Steam, Trucky, World of Trucks, mainly related to cargoes / events or something more unique related to TMP such as:

Disposable:
Try the ProMods server

Multiple:
Play 20 hours a month on TruckersMP servers
Use an alternate vehicle during the given turn
Log in to the site 10 times a month

Long term:
Use 4 seasonal mods for different seasons (spring, summer, autumn, winter) while on the servers.

Personally, if I had to guess, I would say that something related to the event mentioned on to the latest teaser: 

A New Home!? - Operation HQ: https://www.youtube.com/watch?v=u4Re6VAi0v8

For example: Complete at least 10 deliveries to/from the construction of TruckersMP HQ.