How can I make use of CodeGrape?

Hello, I am a new user here. I see that there are a lot of scripts that I don't know the purpose for. I want to understand what kind of content can I upload. I am a PHP and MySQL developer. I also know front end. Can you please explain to me why should I buy some items, or sell them? My prefered section is PHP Scripts.

Here are some scripts that I don't understand why would someone buy them ...

1. https://www.codegrape.com/item/php-email-verification-script/50853
2. https://www.codegrape.com/item/shortty-simple-url-shortener-php-script/50776
3. https://www.codegrape.com/item/php-datatables-easy-paginate-sort-filter-more/50505

Thanks,
Farris

Before you talking about others developer you should improve your work.

i saw your item that aswell not quality standrad.
also i didn't understand that why Codegrape is going down and approve this kinda shits https://www.codegrape.com/item/farrisblog-simple-php-mysql-blog/55439