Even if your team gets slaughtered and wiped out ya still get some advancement … in the Campaign and perks and upgrades for squads … but then I am using the earlier squads of the Berlin Campaign so who knows …
Well, if we are making propaganda about premium account, I guess it’s fair and worthed for just a few bucks, especially if you don’t have much time.
I managed to archive 17 levels by roughly playing 4 hours per day during the first OBT weeks and somewhat, always being first on the team.
But despite losing or winning, its based on your performances. And battle rewards does affect the overhall points gained 
( although, I think the battle pass its more important than the premium account, but its matters of opinions. And I can see the possible counterpoints )
Oh Yeah Battle Pass is much better than Premium …
I have Elite and only doing Premium for 3 days …
I needed some gold so bought the Starter Kit … cause only needed a little bit of Gold and it came with the 3 day … and the units which I will kind of use but not cause I am so far along in those campaigns. So with the gold I got from the Starter I went and got Premium Battle Pass which is best…
with battle pass earning i buy premium
Yeah, a bad game with premium racks me 6-7k a bad game without it I get 2k…