Basically your de minimis rule was supposed to help keep low cost items from getting hit with duties/fees higher than the product price itself. However over the years the constant increase in the amount got out of hand. I mean $800??? That means you guys get a huge benefit to buy from outside the US and not get hit with duties/fees/taxes. Most countries don't have anywhere near that high an amount because of protectionism.Preventing rampant Chinese infringement of IP is definitely a good reason to shut them down.
The part about large scale commerce for individuals makes a bit less sense. What's the problem aside from the bootlegs, and won't we still be able to buy from other countries? Granted there isn't any commerce site I'm aware of outside of China and America right now, but I'm sure there must be some that are due for a big boost if America effectively shuts down the Chinese commerce sites for their citizens.
Chinese companies have used these types of rules, and other loopholes, to muscle out a lot of small to midsize companies. It was supposed to be a way to help China become a developed nation, which they have. Yet no one has had the balls to confront China on this and actually remove all the beneficial rules and loopholes they have used for years. Because of course we want cheap goods (official or not).
I'm not a Trump fan, but you guys have been benefiting from this rule for a long time ($800 was implemented in 2015 under Obama). The question now is who will blink first, the Chinese companies or the American consumer?