This Bytes!!!

EmAzing

No one forces anyone to sign up for HughesNet.  It is up to the consumer to do their research before they buy a product or service.  It doesn't sound like you did so.  

The 20 days of relaxed bandwidth is a courtesy from HughesNet.  It is explained in the welcome email.  As well, 20 days of relaxed bandwidth for each new customer is not comparable to offering unlimited plans, or even plans with a lot more data, as the infrastructure in place can't support it.  

It is expensive because it is the most expensive internet, per capita, to both provide and offer.  It's high speed data limitations are what they are because that is what the infrastructure in place supports.  The 50GB of Bonus Bytes is offered between 2AM and 8AM because this is when the fewest people are online, allowing more data intensive activity.  

You always have the choice of cancelling the service.  If you do, you will be subject to an Early Termination Fee while in a contract and will need to return the modem, power pack and radio from the dish when they send you the equipment return kit.  

HughesNet is not designed for, and is not meant for, cord cutting.  It is a niche service that provides internet where other can't, or won't.  It is not comparable to unlimited ground based services and isn't meant to be.  

Lastly, HughesNet has over 1,000,000 customers, the vast majority of whom are satisfied with their service and use it within its means.  

My advice is to either pay the ETF and cancel the service so you can go with whatever other ISP you wish or learn to use the service within its means.