What's the BF PRO TOKEN used for?

If its anything like the 2042 battle pass,  hopefully the devs make everything available, but it depends how fast you want it. Coming from COD / B06, you could do any unlockable in the season / that battle pass for free, but pay to get it faster with caveats. 

Of course they had exclusives skins and stuff outside that season / battle pass that only could be purchased or limited promotion (like had to log in in a date range or play this mode and then that mode disappears after some time) and then sometimes they could tack these on the premium battle pass so its extra items listed in the premium bp only. 

But COD you could get stuff like double / triple XP for yourself and guns by doing the promos like little caesars, or red bull / monster was running and didn't have to pay the 70-100 USD (shoot the premium BP was a lot ). the premium bp was like buying the game again and then some 

I hope EA doesn't do that COD style but dang remember the SW Battlefront loot box thingy . . . that was bad, so a part me is cynical