Simultaneous turn in a turn-based strategy game.

Yes, you are right.
But there are reasons why I won't make the content for HotA paid,
and reasons why I won't make Online Heroes for SoD free.

For SoD, the plan is as follows:
paid subscription for a month/year
Online Heroes will, of course, only work when playing through the lobby,
otherwise, why would anyone pay for something that has been available for decades through Hamachi?
And depending on the amount of revenue in the first few months, I will either close the project,
or simply maintain/administer it as is,
or I will develop the project, invest time and effort, and implement new features.

How much will the subscription cost? It's very difficult to say right now.
in the range of 60 rubles - 600 rubles per month.
I will be able to say more precisely after the results of the test free period,
depending on how many active players there are.
I may conduct polls within the lobby itself.