Im not going to go into the depth that some of you have on here (although it is fascinating reading i have to say ) But getting limited is part and parcel of taking the offers as i see it.
If i was limited to $25 bets like musicbox it would piss me off but i would plough through it and complete the offer at the lower limits just to piss the book off (it probably wouldnt but i would like to think it did )
Although as Fella suggested they should have it in there terms and conditions that they are able to limit you substantially.
On the spin side i can see why they limit to protect themselves, but in the middle of an offer or limiting so that you cant complete it i see as false advertising and as such the advertising standard authority should possibly look into it
Thats my 2pence worth