For all the hoopla regards the splitting off of the A-League as a separate entity (if I have that right) could someone please explain to me;

(a) why the current 10 teams would want pro / rel.  (What's in it for them?) 
(b) why they'd want expansion, particularly if they're within their 'footprint' and 
(c) where do they think the money is going to come from?  (remembering that some of the TV money has to fund a second division.) 

Not trolling, genuinely interested, because my preferred model is to set up a second division with a view to pro /rel in the future.