Let me try in clearing up ;-)
Reseller LicenseThis defines certain additional rights and grants additional discounts. It is
not a license to use MegaZine3.
Perhaps it is time to review the wording of the Reseller License and update it. This agreement was not touched for a long time ;-)
Basically this license is of interest in these cases:
- Someone needs many licenses over the period of 12 months (life span of the RL license). Than this license grants a 50% dicount; an top of every volume discount.
Example: 20 MZ3-Flex + 1 MZ3-RL result in 20*100 Euro * 50% volume discount * 50% RL discount + 300 EUro RL = 800 Euro (instead of 20*100*50%= 1000 Euro). And even if only a single license is purchase later the 50% svaing for the RL license apply.
- You want to modify the source code AND sell it to your customer. Then you need to have a valid MZ3-RL license in place to do so.
(Re-)Selling unchanged MZ3 Licenses is possible without a MZ3-RL license
- You act as a hoster or publisher, making use of the special licenses MZ3-PUBL and MZ3-HOST: In that case you need to be under a valid MZ3-RL license
All "standard" users do not need to care about MZ3-RL licenses...
So yes: to use MegaZine3 commercially you need one of the 3 licenses. Depending on your business case chances are very high that one of those (or in rare occasions a combination) will fulfill your needs.
MZ3-FIX: is intended for the eBook type use. One Title with usually many pages and many copies on media.
MZ3-TIME: for periodical publications like newspapers, newsletters, monthly/weekly magazines, ... Up to 5 parallel Titles with unlimited pages and issues. So even 5 daily newspapers with more than 100 pages each would be covered. For 12 months (Life Span of MZ3-TIME). Once published Titles can stay online forever. No downloads, no offline copies. A pure internet presentation.
MZ3-FLEX: For everything "in between". Limitation is only by the number of pages (500 Online, 50.000 Offline copies on Media).
This allows you to publish newsletters and if you take old ones offline after exceeding the 500 pages you can live forever with just one license.
The goal is to have a fair prive for the value of usage.
In your case: if those monthly newspapers have let's say 50 pages each on average, then with 12 issues you reach 600 pages. What is still lower than the 500 pages plus the 50% tolerance we grant.
If you than take older newspapers offline, you can publish the next without the need of buying another license.
If you want to keep old versions and intend to publish more newspapers or more pages or more often... then a MZ3-TIME could become interesting.
There are situations where either or could be used.
But hopefully you got an understanding of the basic concept...
Regarding
source code changes and plugins:
Yes, you can modify the code. And if you use it for your own license, you do not need any other license (like a development or reseller license). ALl covered by your FIX or FLEX or TIME license.
Same is true for plugins, which is the prefered method.
You could sell your plugins without the need of a reseller license.
Or to the extreme: you not even need any license to create your own plugin and sell it!
Hopefully this clarifies a bit!