What is the ruling on working with the two aforementioned marketing systems, and does the ruling on network marketing apply to them?

As long as the subscription fee is paid in exchange for benefits and services for the subscriber, there is no harm in subscribing to this system, whether you will sell the product and take a percentage of its price or buy it for yourself and then sell it. This system is neither network marketing nor a pyramid scheme, because the marketing process depends solely on you.