Bear in mind we're talking specifically about the PayPal for Digital Goods checkout flow here; this is distinct from the usual PayPal Micropayments setup, which does normally work as 'ralphielikesbunnysuits' described above.
On the PayPal for Digital Goods page on their site, under the Pricing tab, it confirms what PayPal's reps have been informing us since we agreed to cooperate with them on this new service:
https://www.paypal.com/digitalgoods
- Pricing tabPayPal is committed to giving you the best pricing for both your micropayments and larger transactions. Your fee rate will automatically adapt based on the size of the transaction. Signing up for micropayment pricing is easy too – you'll be prompted to apply as you go through the set up process.
For each transaction we'll charge you either standard pricing, or micropayments pricing – whichever is the lower rate.
Since the Digital Goods checkout flow is a fairly new service just getting off the ground with PayPal, I'm not surprised that all their regular support agents may not be fully informed about it yet. I would recommend using the specific contact number or email link provided on that particular PayPal for Digital Goods page -- if you do call, be sure you're talking to an agent who's fully familiar with "the new PayPal for Digital Goods checkout flow".