About the Security Demon - all I did was use one noxious bomb to confuse him and make him/it use Death on his/itself. As for showing off about killing him/it, it won't show up in the bestiary but you keep the regular Warport ticket and earn the Golden one.
I think the thing about the spins is that the cards you can win from them are only the cards in the opponent's deck (or based on them). It would be too easy to take advantage of taking tons of spins at one time. You could try to take all your spins on a deck that has many copies of certain cards and have a high chance of winning several cards to sell or take all your spins on a deck that has expensive cards but fewer copies of them.
I don't usually mind some grinding but I don't like how the cost of the next upgrades doesn't decrease when you buy a lesser upgrade. For example, to buy the last Initial Money I need 2000 points. Well if I bought the previous 4 upgrades individually, I would have spent 1950 points just right there. This makes starting out and only being able to buy only the lesser upgrades a real pain.
This game seriously needs to be fixed. Stupid units just HAVE to kill off whatever enemy happens to be close by. It's pretty annoying having to call them back repeatedly so that they aren't halfway across the map while I'm waiting for the rest of my units to arrive.
 "MARDEK RPG: Chapter 3"){kind=icon}
 "Elements"){kind=icon}
 "mini Tower Defence (mTD)"){kind=icon}
 "Robot Clashes"){kind=icon}
 "Epic War 4"){kind=icon}
 "Epic War 2"){kind=icon}
 "Death Dice Overdose"){kind=icon}