Hey John,
to answer your first question remember that it only affects the player that is developing it, not any attacker attacking that player… For example let me run you through a basic battle of 2 Infantry and a Fighter Defending vs. 3 Infantry a tank and a Fighter Attacking, and give you the “minimum roll” numbers for each.
Without Jet Technology: The Attacker Fires and must roll a “1” to get a hit with the Infantry, must roll a “3” to hit with the tank or the fighter. The Defender must roll a “2” with the Infantry and a “4” with the Fighter to Get a hit.
With Jet Tecnology: Same as above EXCEPT that now the Defender may roll a “5” or less in order to get a hit with the Fighter.
Question 2: The money is not given to the “Attacked” player but deducted from his IPC amount. That is given to the “Bank” or general cash pile that no one owns.
Hope it helps… If not clarify where I missed answering…
GG