It's because there is no coordinated follow up plan... It is just "Build it and they will come".... The reality is you need to get people attending at least three times to get engaged and (hopefully), see at least one decent meeting... To make a fundamental change to your life you need to do something consistently for 28 days... Speedway need to get people attending regularly and it starts with those vital 28 days... Email and Mobile details, free family tickets, constant communication, feedback from their first visit requested,  etc etc etc... Expecting them to return after one visit, even if free/discounted, and pay full price next time, is asking a lot... But, that often appears to be "the plan" at many tracks... Glasgow, and Plymouth, showing what can be done...

Which raises the expectation that all the races are like that and when they go and find out they're not, will they return? Agree with other points.

The current streamers could do this really well... Instead we seem to have "the best race" from a meeting on YT... Any non Speedway fan who the algorithm suggests this to them, will have zero idea about context. eg what does this race mean? what is Speedway? Etc... They would be far better putting together 15-20 mins of "before and after" background and action and get it sent out to those who follow bike and other motorsports through the algorithm... They could even earn money off the viewers and subscribers...

All those things are great and may have got a lot of people through the door but when they attend and stand out in the cold/wind being 'entertained' by someone on a mic talking drivel or just music for what seems like an eternity balanced against the 15 minutes of actual races, of which two were interesting then most won't come back.  It's the entertainment at the track on the night which has to improve - and I don't mean just more races.  More interaction, more involvement of fans in the night, interactive social media, rider interaction, play areas/side shows and many other ideas that people have mentioned before.

With only 1 over8 he won’t get into any Team at 3 or 5.Stills No1 in my book.

This is exactly what I am getting at. You need to make it easy to stumble across as well as keeping it short enough to keep viewers engaged (not too much nothingness between heats).