The secret ia that 90% of them are garbage. When someone boasts how they are getting courted left and right I have a chuckle and put them in my "very impressionable" bin.
The second lecture uses an interesting code snippet. An example written in java taken from a book written in 1986 used to explain a C vulnerability. Something seems out of place.
I'm interested in this as well. I'm not wholly familiar with the shipping process, but does the business rely on taking advantage of any shipping cost discrepancies?