The refunds are due to hackers player for 2 hours, being banned then refunding the game. $10 steam game code - 2 hours then a banning. Refund, buy new code and repeat. Thats what they do.
To clarify a wee bit, Bossland don't make WoW cheats or hacks, they make purely a bot.
Automation can be described as cheating I suppose, but the fact is, Honorbuddy doesn't do anything a human being can't except play for 48 hours solid, but it'll get a lot less done in said 48 hours than a lucid human being would.
Now, the terms of service for WoW do state not to do this, and Honorbuddy does modify the game client in a way that Blizzard do not authorise by using memory injection to accomplish it's tasks.
It's also a paid for product, which means that Bossland are profiting from a service that Blizzard provides by charging for a service that requires Blizzard's product to run (and Bossland's products are a service, not just software).
Without getting permission from Blizzard to do this (which Blizzard will never give, if only to appear to be anti-botting) this is unlicensed use of a product for profit and certainly doesn't fall under fair use of the product, ergo Blizzard have a very strong civil case against them.
In terms of cheating in Overwatch, it's very easy to argue that Cheating lowers the enjoyment of non-cheaters and can cause Blizzard financial damage as it could lower sales.