It looks like TM have release a lot of seats, even for later dates.

Out of curiousity I just searched TM for the dates I'm attending in late August and was offered, for a single seat:
-Block C2 row E for August 28
-Block 111 row F for August 28
-Block F2 row E for September 1st
-Block 102 row H for September 1st

I even tried for 5 seats together and was offered block F2 on Sept 1st.

Didn't buy any, altough I'm tempted by C2 from the feeback from yesterday, but I promised myself I wouldn't buy anymore...