1. YES
2. My opinion is that because everyone can't afford them. The big schools would have no problems getting the technology, it's the small schools on the schedule that depend on the money from the big schools, just to break even, or to buy equipment, that would have problems getting what was needed.... and/or there is nobody to check to make sure that there were no cheating going on. All that stuff would take more money.
3. In a spread offense, the WRs know their routes. There are very few "Option Routes". In the NFL there are TONS of option routes. A lot of spread teams teach their offenses in "concepts" so that its easier to learn. Since a lot of these kids play in spread offenses in high school, it makes learning them very easy. So for instance (I'm a Franklin guy) if I signal in a play like, "Ace Y Shallow" all four WR's and the QB should know exactly where they should go. The QB is taught from DAY 1, that anytime he hears "Shallow", his progressions are "Fade, Shallow, Dig, Shoot". The QB has said this to himself a million times. So when he gets the ball even when he's running ROA (Routes On Air), his eyes and feet must set as if he's looking at each of those routes.... as he's saying the routes out loud. So Y Shallow goes like this. "Pre snap" can I take the Fade? No, then at snap, I'm looking at where the Y (shallow route) is coming. If I see empty space, (means man to man) I'm throwing it there. If I see an opposing jersey in that area, (don't throw it, unless I hate my Y receiver, or my name is Dak Prescott, lol!) my eyes go to the H "Dig" (10yd and in behind LB), If I see an open window, throw it there. If its cloudy, I'm going immediately to my RB in the flat "Shoot". It's repped hundreds of times from any formation. Those kids always have the same routes.... unless you change who runs the shallow. But for the QB there will always be some WR that is responsible for being in the same areas.
4. In a spread system, your entire game plan is predicated on hurry up, so you do what you always do, just do it faster, lol. The spread was created from a 2 min offense. So now, your "Ace Y Shallow" just becomes "Shallow". Most coaches will reduce their verbage and their playbook in hurry up situations so they can go faster. one formation, one screen, all verts, mesh or shallow, one run, and a deep concept like "smash". So thats one formation and 5 plays. Hope this helps.