ProtoGame Rebound Syndrome

The ProtoGame Rebound Syndrome is a business practice on Arcades in where pressing start while there are credits (or inserting more credits) while not during a continue countdown gives you a bonus in exchange of the said credit.

The Practice
The Practice consist of pressing start with credits remaining to consume credit

ProtoGame
atleast here, you can turn the setting off, and you can't use a Rebound if you have the maximum amount of lives.

Franchise-Specific

 * You Don't Know Jack is one of the, if not the earliest use of this trope
 * ProtoGame's Light-Gun Games gives you more lives, and you can get something more depending on game, the ProtoGame lightgun games also had a "Credit Training", where you start up with a maximum of 5 Credits, but you can increase the Continue limit up to 20 Credits (getting a game over will increase the maximum credit limit, not continuing (only if the game is over for real if any player does not continue, not by each time any player refuses to continue) will increase it by one, running out of Credits will increase it by 2, beating the game will also increase the limit by 3, if you beat the game for the first time, you unlock the "Infinite Credits" and Rebound options.), there are two rebound options, enabling rebounds and
 * Marcus Stone series - you gain one to three lives (depending on setting) and a random weapon
 * Code G3M3N1 series - again, you gain one to three lives depending on setting (your defense meter is also refilled because why not?), instead of a random weapon, you get more ammo for your three unreloadable weapons, fourty Spazzer shots (fifty before 4th Strike), one Bomber shot, and five freezer shots.
 * Gaiablast! - your health is restored by 50% and you gain 1000 coins for your current run.
 * Blackout Rescue - You gain two extra lives and one to three extra bombs (depending on dipswitch)
 * Nyami's Monster Mayhem - yet again, one to three more lives, enemies on-screen will take damage.
 * In Fighter's Tournament 2 to 5, using a credit will completely fill your super meter (only possible against CPU opponents).
 * In Cat Alexander 2, 3 and Fairly Odd Tales, you get one to three extra lives, and 20,000 points.

Non-ProtoGame examples

 * Most Konami beat-em up arcade games had to give you extra health/lives when you sacrifice credits.