No, all of your users in Noloco are billed by Noloco, not Airtable. I think their cheapest pack is for “up to 100 external users”.
When Noloco communicates with Airtable, it communicates through one Airtable account that you specify. So you only need one account in Airtable.
I gave a brief tutorial of Noloco on this episode of the BuiltOnAir podcast.
I also presented a full one-hour webinar on Noloco called Building a Client Portal on Noloco powered by Airtable.
And the CEO of Noloco gave a demonstration of his product on this Airtable podcast episode.
p.s. If you have a budget for your project and you’d like to hire an expert Airtable & Noloco consultant to help you with any of this, please feel free to contact me through my website: Airtable consulting — ScottWorld