[ Irrelevant ]

[ Irrelevant ]

You can't steal more than a certain % than what you have.

That ^

You and your target have to have tech and as TDA stated, its based on a percentage as well, also have in mind that there is a spy DR too.

Spy DR? I know you can spy a country out, but it just fails, not DR.

You can only steal tech you have, like with a research ally you can only receive tech you have, and it is a ratio between what you have and what they have. The exact formula you would have to ask qzjul.