You want to allow users to enter their own amounts?
If I understand your question correctly, yes, this can still be done. It’s a little different then before with PayPal Standard.
Before, you could enter 0 and it would redirect to PayPal to let the user choose an amount. The new PayPal Express checkout removed this feature, so we added it into the plugin so it will always work no matter if PayPal makes changes again in the future.
Now, you need to choose Manual Entry and enter 0.00
It will look like this on your site:
And that will allow your visitors to choose a custom amount.
If I understood your question incorrectly, please let me know.