Hi ans, By perpetual fee, I mean that for as long as they are offering the Onero program, they have to pay a monthly fee, so it's ongoing.
I just found the pricing page for providers and I think it's in Australian dollars (AUD). If that's the case then it's not as bad as it first appears. That would mean it's $150 AUD + GST (goods and services tax of 10%) = $165 AUD. At the current exchange rate that equals $105 USD.
Providers also have to renew their Onero license every year. It requires a quality assurance check and remittance of an additional fee.
You can have a look at the pricing structure here: https://onero.academy/pricing/
Just scroll down to the FAQs at the bottom of the page, and click on the 'Fees' tab.