Surprised this has attracted so much criticism.
Every firm on oddschecker will restrict different punters to different amounts on virtually every single event they trade.
…and it is the same for marketing led pricing offers (which this obviously is). Paddy Power’s Money back offer if Hurricane Fly wins is for a maximum refund of £100 per customer, for example, yet I get offered less than £20 if try to back anything. Not moaning about that particularly or singling them out – it is just the way it is.