Pricing for online services?

Question

Fintech

Kindest.
I think many people used paid online services, such as SaaS systems, i.e. online products that wanted a monthly fee for use. So, I'm interested in the public - have there been any articles on the subject of pricing for services? Maybe someone himself faced with the task of setting a price tag for the work of the service? How can you calculate the final price depending on several types of load on the service? I do not take the calculation of the cost, everything is transparent there.
Interested directly "for which unit of measurement to take money?". That is, Internet providers charge for traffic and / or channel width. Cellular operators - in minutes / seconds, software manufacturers - for licenses, hosters make tariffs based on location, number of bases, traffic and many other parameters. SaaS providers are already starting to vary their price tags, either based on the number of registered projects / users, or on the space for their data (expressed in certain marketing values).
In general, “for what units of measurement to take money at all” - on this topic I would like to study sources, articles, blog posts, books. Who that met on this subject?
Thank you.

Answer 1

I came across an old question of my own, rail to write what they came up with.
And we came to this: https://wmspanel.com/prices
In short, we take for the stored data.

Answer 2

> and what unit of measurement to take money
I consider it is necessary to take for kol-in the stored basic entities of subject area. For example, for CRM this is the number of contacts, for online stores it is the number of orders, etc. Definitely do not need to limit the number of users. This is a repulsive limitation for a potential SaaS buyer.
As a rule, it makes no sense to determine a specific price from the cost price. It is better to imagine how competitive your price will be in the market, whether the buyer will pay so much for such and such a service.