API Pricing

Probably a silly question, but I’m unclear as to the “usage” and “free views” concept. I’m not a developer by any means, but I run an Irish motorhome group, with free membership, and I was wonderingwhats the best way to build a map for my members that doesn’t cost anything, At the moment I have about 2,000 members on my website that would have access to the maps, and I don’t really want to start charging them for using the site maps, which would have around 900 POI’s with navigation for them to use,
Apologies for my noy understanding the payment/free views thing, any help would be great.
Thank you