"Well, actually I see it as a way to trade technologies(...)"
It's not that simple. Few weeks ago devs decided to set game rules to autocollaboration - after your last province is conquered you automatically join invading country. The idea was to give players time to know each other and not to auto-kick out of the game anyone, who loses war (after weeks or even months of development). Idea is great, but solution is bad and we talked about it much on the polish game forum. Because it means that when you are winning a war there are many new players in your ranks - without your permission and many of them will of course become spies, who give their former country intel about armies location, their strenght, industrial centers, landing strips and so on.
And now we are also talking here about non-authorised research spreading. Imagine that: Gemany loses war, most of its players emmigrate to Argentina. But one of them stays in Germany, becomes conquered, then he secedes instantly and all Argentina makes accession to this one-province country. This one province will be conquered, because it is surrounded by the Polish teritories and armies, but rest of Argentina is on the other side of Earth and has a fresh start, but with superior Polish technology from the beginning and only a different name.
And this is only just one idea how to exploit game rules. There were and are much more of them, some of them devs fixed with our help, but some of them are not so easy to fix - like this one.
The game is still in beta phase and until these kinds of problems are being fixed, it's up to you how do you want to play - being fair or using exploits. Few weeks ago I wrote to devs that sometimes it is possible to strengthen firepower of some of your units by even 500% and explained how to do it. They agreed with me. I didn't have to do it, I could just use it to my advantage. But I don't want to win by any means, I just want to help them to make a better game. The main idea is great - it's something between HoI and Panzer General series, but with living, intelligent opponents on the other side. It has potential to become one of the greatest strategy of all times, but it still needs much work.
So if like this game, help devs to make it better. If you see some kind of error, bug or possible exploit - report it. If you have a great idea - share it. They are really listening to community. In fact large parts of the game are some variations of my personal ideas, some of them modified, some just inserted directly into game. I gave the idea of actual (and future, more complicated) tech system, I had a great influence on the units and buildings statistics, land modifiers and so on. Currently we are helping to make economy system more realistic. So if you want - join and help us.
Next version of tech system should be based on the current but with one major change. When country will finish new project, player will be able construct their own personal designs based on the tech level. You will have basic chassis for, let's say - med tank and some design points to distribute between speed, armor and firepower. So you will be able to build fast and weak scout tank, slow, but menacing destroyer, balanced all-purpose basic tank and so on. It will be up to you.
And if this system works, I'll try to convince them to make it even more complicated, but much more interesting. There will be historical engines with some power output, but also with some weight, fuel consumption and using some space. Historical cannons and mgs using some weight, space and with different damage and ammo consumption. And maybe other equipment - radios, targetting systems etc. And players (or ministers) will be forced to make their units from these elements. If the power output will be to small comparing to total mass, tank will not move or it will be very slow. If cannon will be to big for the type of chassis - you won't be able to mount it (so you won't be able to make light tank with 152mm cannon, you will need bigger chasis to do it). If you try to make unit it too tough using too thick armor - project will be too heavy for it's power output and it won't move. And so on. I think it could be quite interesting.