There are many reasons for an organization to collect funds that are not donations. This could be anything from subscription and membership fees to payments for content and/or items.
While Donorbox is predominantly a donation platform, you can still use its features to collect payments. After setting up the form the way you want, you can edit the final button checkout button to read "Pay" instead of "Donate". Here's how:
Click the Amounts section. Then, scroll to the "Donate" labels subsection. Here you'll see the option to select the box "Change the 'Donate' labels to 'Pay'".
Hit "Save" and you're all done! Now, when visitors get to the last button of the checkout process, it will read "Pay", not "Donate".