I think for a tenner you will get a mix of NL riders and some second string Championship riders(semi pro).Not knocking them at all.I wish I could be as good,but if the ave Prem club get 1300/1400 and 1000 are £17.They get BT money,so TV coverage for sponsors,so they get a bit of value(although I agree I don't see how sponsors gain from it).For a tenner,probably no TV money,maybe 6-700.I can't see how speedway can make it pay at £10.
If you knock the Prem price to a tenner,you might get 2-300 more,but not enough.I might be miles out,but I hope so.