2 offers come to mind 2006/07 Charlton at home kids for a quid just before xmas the attendance for this game backs that up ... 32,013 the previous home game getting in just over 23.5k against Wigan
View attachment 68521
The other 1 i remember was a double header with the club heading for relegation a 2 for £20 offer covering home games against Hull and Fulham crowds jumped from just over 24k to 2x 30k attendances
We must have really been struggling on walkups at that time having to do ticket deals whilst still in the Premier League
View attachment 68522