Nope, these words make perfect sense, such that I'm surprised you're challenging me on them. I would define deceptive as any practice in which the business lies to, or attempts to deliberately mislead, the consumer. Here are examples. All of these are illegal in the US:
Selling counterfeit goods as real.
Selling refurbished goods as new.
Rolling back odometers.
Claiming a product is made with titanium when it's instead made with brass.
Telling a customer they need new brake pads when they don't.
Telling a customer a charge is require by law when it's not.
Fake sales.
Bait & switch.
The fact that a sufficiently sharp customer can see through all of these doesn't change the fact that they are deceptive practices.
Does Apple sometimes engage in deceptive pratices? Yes. But Apple is very clear on what its upgrade prices are for RAM and storage, so those charges are not deceptive.
I would define predatory as practices that a business engages in to overcharge the consumer once they are effectively locked into their product. For instance, it's hard for the poor to obtain bank accounts, so once they have them banks know it can be hard to switch banks. Thus, according to this article from Business Insider, "Mainstream financial institutions have created a host of fees and penalties over the past few decades designed specifically to target and profit from their poorest customers."
Over the years, banks have layered a number of financial complexities on top of their overdraft policies, further rigging the system in their favor.
www.businessinsider.com
As Apple's upgrade fees they are a not a surprise charge you incur after purchasing the product, they are not predatory.
I think the more legitimate complaint is not about what they charge, but rather about the fact that they don't give you a choice, by preventing you from upgrading the storage on your own. Unlike with the RAM, which needs to be soldered, there's no technical reason their NAND can't be slotted and replaceable with aftermarket parts.
But at least if you don't like the upgrade fees, you do have another possible choice: You can instead buy a used Mac (I'd recommend finding something in pristine condition that still has AppleCare), thus saving yourself money and denying Apple the new sale.
Apple is best seen as a quasi-luxury product. Complaining about Apple's upgrade pricing is like saying "I really like the look and feel of a Mercedes, but I think they charge too much for the options I want, so they should reduce their profit margins so I can afford one".