I guess they may pick up a couple of hundred extra season ticket sales with this leaflet campaign but I can't see it being many more than that. At the end of the day pretty much every United fan that is in some way clued up about their club will know that there are season tickets available to anyone who wants one. Those that aren't or are always moaning that they "can't get a ticket" are probably not dedicated enough to lay out the cash for one anyway, and would sooner watch them down the pub.
Does anyone have any idea of roughly how many season tickets remain unsold there? Someone mentioned 10,000 the other week but as funny as that would be I can't see that many bailing out in one go, probably more like 2,000-3,000 tops. What can't be disputed is that this is at least the 4th season running that United have had a number of season tickets on open sale.