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:
Log into your Donorbox dashboard and click on the "Edit Form" link next to your campaign form.
Click the Advanced tab. Then, select the option marked "Change the 'Donate' labels to 'Pay'" so that it has a blue checkmark.
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".