While that may be technically true about lopping off a low zone, for pictorial purposes I find both TMZ and Delta 3200 serve me well at 3200. I've never tried either at slower speeds because I like Tri-X in Diafine at 1250.
As far as price gouging, I've switched to B&H for most of my film since they finally started shipping UPS without requiring a signature. I do appreciate Freestyle, their house brand products, wide selection and commitment to analog photography and do try to support them but I also do personally feel that jacking up the price because something is discontinued is unethical bordering on immoral. Some folks just shout "supply and demand" as if that makes it ok. I guess it depends on how rooted (I'd say "mired") in capitalistic theory (I'd say "claptrap and rationalization") your personal ethics are. Unless they had to pay more from their supplier or more for shipping or their overhead went up or something, I find it unethical. OTOH, I'm not above taking advantage of it when it's to my advantage. They still have Efke IR820 in 120 where B&H has been out for some time. I have another ten rolls on the way. Sure, I paid $2 a roll more for it than before it was discontinued, and it was expensive film already, but OTOH the higher price no doubt meant they are selling it slower and thus I can still get more. I'm still not fond of the practice.