I know for some games at Wembley - the ones that corporate types don't give a shit about - the middle tier is turned over to regular supporters. I'm can't see any way that could be described as supporting corporate hospitality.
These tickets, if the quoted value is true, sound rather expensive, so maybe they are in genuine corporate hospitality.
In many parts of the world corporate support genuinely does subsidise tickets. Given that there doesn't appear to be any link between ticket prices and the number of executive boxes teams have, it's clear it makes no difference at all in this country. It's just treated as extra income.
I'm not against corporate boxes in principal. There's certainly nothing to suggest Reading fans in the west stand (or anywhere else in the ground) suffer in any way because of a line of boxes in the stand. It only becomes a problem at a larger scale where whole tiers of grounds are given over to boxes, such as at Arsenal or Wembley. By bending over backwards to suit the box holders, clubs seem to care little that they are shafting the ordinary fans by giving them poor views as a result. The lower tier at Arsenal, for example, probably offers the worst view in professional football in this country, with the exception of Brighton and Rotherham who are playing in temporary venues. That's all because they squeezed in two tiers of boxes, and there were limits to how steep they could make the top tier above them.