Piltdown Man, either pay for the seats you want, or else accept that you'll have to accept whatever the magic seating computer in the sky gives you.
But have and I have not complained about it. What grips me is being chiselled. It's like buying a pint of beer - and then paying for the glass hire. And then being asked if I'd like it washed and then if I'd like the glass cooled (because of the hot water). And then a "what pressure would you like your beer pumped at?" because your beer is in the still in the barrel and you now need to buy some gas. And so on...
You are obviously OK with this but I find this method of business un-justifiable, abhorrent and unacceptable. I will do all I can to stifle this style of business.