It's not really a free pawn...
Queen's Gambit

for now, it is. later white could play Nc3, e5 then Bxc4, or if they are aggressive they could play Qa4+ (i don't recommend that move) and win the pawn

Dxc4?! E4! 1-0 imo
3... e5
*Players have agreed to a draw*
actually I always get good positions from the resulting queenless endgame, I'm not quite sure why :think:

Well you definitely have a good score with it!
I don't think that means 3.e4 is automatically winning for White, though. I think you're just outplaying your opponents.

Well you definitely have a good score with it!
I don't think that means 3.e4 is automatically winning for White, though. I think you're just outplaying your opponents.
yeah I'm just toying around with faulty logic here

Dxc4?! E4! 1-0 imo
3... e5
*Players have agreed to a draw*
actually I always get good positions from the resulting queenless endgame, I'm not quite sure why :think:
There is no "queenless endgame" here, unless you intend to answer 3...e5 with the bad move 4.dxe5.

Dxc4?! E4! 1-0 imo
3... e5
*Players have agreed to a draw*
actually I always get good positions from the resulting queenless endgame, I'm not quite sure why :think:
There is no "queenless endgame" here, unless you intend to answer 3...e5 with the bad move 4.dxe5.
Yeah I got my lines mixed up... I've only played one game with 3...e5. To be honest I should study the QGA more, my theory ends after 3.e4.
from here black could play dxc4, taking the free pawn, or they could decline the gambit with e6 or c6, called the Slav Defense.