AC 12:46 here (not now, and never have been, an ISP troll - the idiot ISPs advertising "unlimited" and getting away with it are as big a problem as the mickeytakers).
"it costs the same regardless of the traffic that it is carrying."
it only costs the same till enough mickeytakers move in and cause significant congestion somewhere along the way, which is bad news for all users, not just the mickeytakers. So what happens when the network gets congested? The ISP either spends a fortune on more kit, which won't usually be a permanent solution unless other changes are made too, or applies some form of traffic management (or capped tariffs), or enough heavy-usage punters leave because the service is abysmal (thereby eventually removing the congestion and fixing the problem).
Are you familiar with Entanet at all? You might want to enquire about what happened to them when they went "unlimited" at an out-of-line price. Random name, plenty others have made the same mistake.
"I have a un-contended 1:1 connection with a 50GB limit"
Based on other parts of your comment, you don't have an uncontended 1:1 connection.
By definition, uncontended 1:1 connnections do not have limits.
By definition, connections with limits (such as the 50GB you mention) are not uncontended 1:1.
In the real world, £59/month services are not 1:1 uncontended (not for long anyway).
Go away, try to understand the difference between (a) 1:1 dedicated bandwidth which is expensive and not mass market and (b) contended bandwidth which is a whole lot cheaper (because it's shared ie contended) and only runs flat out till enough mickeytakers move in.
Someone round here definitely doesn't know what they're talking about.