1st, thx for explain your suggestion a little bit more.
2nd... well you don't have that "service" you've paid using DM because of you (deciding cancel it).
So first, you should carefully plan if you really need that building/research and if you realle really wanna speed up it.
So... I don't see why this is needed.
What is really needed is to think and planify a little bit your buildings/research development and you DM investment, that's it
No, for example now I am getting sources in order to get astrophysics lv 20. I will spend DM (yes the DM I that I got in the competitions :P) I am sure that this is what I want.
BUT what happens if when I am researching astrophysics lv 20 and some destroy me? Maybe now I decide that all sources are needed for other things..maybe rebuild my vessels..don't you think so?
---> In the end I thought this suggestion in order to get a better DM experience (for all players).
The problem I think is the system of refunding DM, am I on the right think?
well.. you cant walk into mcdonalds, buy a burger and stuff, eat it the half way and notice, you need to leave straight away and then ask for half of the money back, just because you didnt eat the whole burger.
(well... you probably could at mcdonalds, but i hope you get what i mean)