It's a complicated business with lots of attention to detail, but I have been doing it for almost 4 decades now. During the first decade, I worked under my "mentor" (RIP).
The "internet snitches on TikTok, IG, etc" have been eroding my profits more and more. In the early 80s, while a college student, profits were sometimes hundreds of percentages (300% - 800%) of the investment. Once the WWW started in the '90s the profits have slowly been decreasing and picked up speed as more and more "influentials" sold courses on dropshipping, online businesses, etc., and everybody started to scam everybody with subpar products, bait-and-switch fraud, or just NOT shipping. ca#"!