No, you won't. There is no enforcement if you're coming and going by air or land. If this is enforced, it will be done at in country immigration offices.
Yes but that's because those earning US$40-80K or making large investments aren't going to be moaning on a forum like this all day.
With DTV applicants, or rather, potential applicants, some are looking at a simple method of staying in the Kingdom long term, without qualifying for another type of visa.
For some of these people, the DTV is suitable due to its relatively simple requirements.
Even so, it's not a walk in the park either and consulates are tightening up rules.
I've corresponded with some LTR holders. They're not necessarily the most eager to spend. It's a facade and that visa is a poor deal compared to what you can get by migrating to the USA with around the same investment.
A 5-year visa "too good to be true"? Not really. It allows a 6 month per entry stay. Yes, that's longer than existing visas, but it's probably the way of the future. The LTR visa is an even better deal, but is that "too good to be true" as well? Hardly.
These DTV visas (and even the LTR ones for that matter) don't offer a pathway to residency. it's difficult to open a bank account on one.
There's a whole lot you can't do if you're on one...so it's hardly something to be envious of.