Won’t work. If something is free, people with little interest will always grab tickets at expense of keen regular fans. Touts will have a field day.
Oldham tried a feee game about 15 years ago and the ground was full of freeloaders who had never been to a game before and probably wouldn’t again. Caused much annoyance with regular fans and even season ticket holders who couldn’t get in.
Then we had our Chester rearranged game after abandonment and there was supposedly double the amount applying for free tickets than there was actually there in the first place, with genuine fans missing out on the ‘ballot’. And then when the game was actually played the away end was half empty, but if you didn’t pay for a ticket in the first place, then nothing lost if you don’t bother going.