Here in rural north central Ohio, most stadiums only are big enough to allow 2 tickets per player, cheerleader and band member for actual attendance at football. It's 4 for volleyball (a lot less people to share tickets). Streaming options vary. Some schools are doing simple Facebook Live streams for free. Some schools are having companies produce broadcoasts that cost $10 per game, of which $4 goes to the school.
Having spent most of my professional career in the scholastic products business, this a golden opportunity for interprising folks to make a mint. With attendance limited to the lesser of 15% or 1500 for football (although the OHSAA released an update today on guidance for social distancing on areas outside the fence), the revenue stream from advertising for live streams is huge.