Later, I find that you have turns that you need to use to produce military to sell, but attacking all those turns would cost too much.

Is it worth exploring or cashing all my turns?

Explore or build c-sites earlier. Cash later on. But don't spend too many turns doing that stuff, spending more of your turns attacking and building and growing is good

300 CS to burn turns,

spy ops and attacks to grow/while spending turns effectively
or
All-X

Either way build only ICs, keep tech levels at 155% and try to get military/bus/res as you can.

Rinse repeat as you see fit, once land goals are hit run 20 turns, sell run 20 turns sell. blah blah blah

Cable is pro! Same idea that I do when I run CI.

If you all explore I recommend cashing at least the last 360 turns. 40-50bpt works well. Try and have 60 CS by turn 100 Sell as much as you can whenever you can. Once it is sold figure out how much cash you need to grow before selling again take remaining other cash and get indy tech before each set of turns played then bus and res then military. If you can pull it off also makes jets with as many of your last turns as possible. I am no pro.. but this works for me :)

100 BPT is what I'm running, didn't plan it, sorta just happened cuz building CSs is better than cashing or exploring at this point :-)