> Like if gas is $5 and RE is $1 the RE folks get $5 instead?

yes

if there's 1mW of gas in the grid then everyone gets paid the gas price

this is called pay-as-clear, and has some positives (strongly encourages RE construction), and some disadvantages (zero long term planning, paying gas generators absurd rates if they can squeeze in at the top of the auction)

UK government is consulting on changes to this system at present