"Yes, but that doesn't mean that they are gaining equally from that transaction. "
So what? Why would they need to gain equally? Each is choosing it because they determine that to be THEIR BEST POSSIBLE CHOICE. The judgement of some elitist ass like you isn't relevant.
"Indeed, chances are pretty good that the corporate entity is gaining a whole lot more from the transaction than the consumer is."
That isn't your call to make and even if it were it is none of your business.
"Unfortunately, for many transactions the consumer has little choice."
So what, others do not owe them options.
"We don't get to choose to simply not eat, for example"
Nobody is making you need to eat. That is purely your body making you need to eat, so why do you think others should have to make allowances for that?
"(and most working people don't really have the option of spending half their day fishing)."
Actually they do, they just understand that isn't as productive as going to work...
"What the article writer seems to miss in my mind is that UBI needs to go hand-in-hand with a reasonable minimum wage."
No it does not and given you have provided no evidence or arguments to support you claim then by Hitchens razor I dismiss it with none myself.
"UBI shouldn't be a way for government to simply provide cheaper labour for corporate entities -- that's simply corporate welfare."
UBI is immoral and unacceptable.
"UBI needs to be balanced with a reasonable minimum wage to prevent these sorts of abuses."
Nope it needs to not exist, like minimum wage.