It’s not necessarily human intervention that did this, the Sahara desert was a lot smaller back then, and there’s evidence of regular rain eroding the Sphinx. A similar process happened to the Levant.
Yep, their business model is basically to sell smaller packages for a low upfront price, taking advantage of customers that either don’t have the money to buy the big package or have limited transport options.
It’s another one of those things that illustrate that it’s expensive to be poor.