The scrap stealing system in terracore is pretty sweet. You can steal a maximum number of scrap equal to the difference between your attack and their defense. So 60 DMG vs 30 DEF = 30 maximum scrap to be stolen from that player's stash. If your FAVOR is higher than the defending player, you will steal a random percentage of their stashed scrap (up to the limit defined above) between 25-100%. If your FAVOR is lower, you steal a random percentage between 1-50%. If you have 0 FAVOR, it is between 1-25%. even 0.00001 will make huge difference almost by 50% immediately claim now and put whatever it is in favor. 0 favor allows the attacker to steal up to 100% of the difference between your defense and their attack
if you have some favor that becomes upto 50%
if you have more favor than the attacker that becomes upto 25%.