A couple mark of distinction/Event vehicle questions

[Soviet_onion11]

1. When it says you can use a rank one vehicle, does it mean you can have a rank one event vehicle in your lineup and can use other rank one tanks or only use the event vehicle

2. Do profile picture boosters affect progress towards marks?

[Soviet_onion11]

And also why do rank III tanks have better multipliers than top tier?

[Circleati]

@Soviet_onion11

does it mean you can have a rank one event vehicle in your lineup and can use other rank one tanks or only use the event vehicle

you have to use the event vehicle at some point in the battle

@Soviet_onion11

And also why do rank III tanks have better multipliers than top tier?

I believe that the point multipliers for the ranks are to even it out so that its equal difficulty to get the same points regardless of rank