A Theory
 

Just thought I’d share x

BB9, BB10 & BB11 were the last on C4

BB9 eye was similar to BB17 eye (glass smashing)
BB10 & BB18 both promoted diverse casts & had very low ratings
BB19 is that last series in the current contract, it could be similar to BB11 in the fact that it’s the last one

If they are going to cancel BB, let it have series 20 to have a big All Stars to end it.