The "truth" is that cheap HV .22LR was getting more difficult to find well before Sandy Hook. Economy was/is bad and lots of folks shooting more .22LR than ever before in HUGE numbers.
Look at all the new "black rifle" .22s that have come on the market in the last few years. S&W 15-22, Colt Umarex M4, Sig522, Ruger SR-22, Mossberg Tactical, H&K 416, Omni M4, ISSC Mk 22, Remington VTR, and GSG makes a dozen different ones from AK to MP5. NONE of these were around just a few years ago, and they all come with high capacity mags. Anyone look at Ruger's .22 handgun lineup lately? Every possible configuration... rails... threaded barrels... aluminum... you name it, they got it! And how about all the centerfire pistol replicas there are nowadays? Used to be if you wanted to shoot .22s from a 1911 platform you got a conversion kit. No more... everyone is making a 1911 .22 or slapping their label on one...
The manufactures aren't making them because no one is buying them... they have been flying off the shelves in recent years.
There has been an EXPLOSION in rimfire suppressor sales. Folks have discovered how much fun it is to shoot all the threaded barreled guns listed above with a can hanging from the muzzle. What was taking 2-3mo to get a tax stamp is now taking over a year. Trust me on this... I've been waiting on a tax stamp since Feb.
The "truth" is that demand for .22LR has skyrocketed. Panic buying the last 12 months after Sandy Hook allowed folks to exploit an already tight market, but it is far more an issue of demand. Tight markets are always going to attract those who will exploit it for profit, that is nothing new.
When you can't afford to shoot this 1,000 rounds per month....
You shoot this....