Result, Worth
Noun
かい
努力の甲斐があって、そのニュースレターは廃刊になるのを免れた。
Thanks to his efforts, the newsletter was able to avoid being discontinued.
A turtle shell that is patterned has much more effect and result and worth than a non-patterned turtle shell.
You haven't learned this reading for 甲 yet, so here's a mnemonic to help you:
If you want to know how much you're worth, just take a look at your car (か). Cars are the result of money and hard work. So basically, they say how much you're worth!