Purchase a vehicle and switch seats within it. E.g. purchase a quad bike and then get into the drivers seat, switch to the passenger seat and the problem should be solved.
Restart your router/modem and if a restart does not fix connection problems, close the game and look for: C:\Users...\AppData\Local\Arma 3\MPMissionsCache
Delete the contents and try connecting to the server again.
Not to be confused with the BE bug - the best solution to this is to try verifying your game files via Steam.
When you drop off your teammates you get rewarded based on how many enemies are inside the zone.
You get a minimum of $50 per person you drop off.
You get a maximum of $100 per person you drop off outside the zone.
You get a maximum of $150 per person you drop off inside the zone.
Reward is calculated in increments of 10.
Enemies in zone * $5 = Reward