How much?
0.5 BTC Core Price (it's 99% of CAT code)
Then you must add any API Price you wants to add.
This is the price list :
Is YoBit discount code still good?
Yes of course.
Will you accept a mix of coins for payment (not sure I have enough BTC)?
Usually i don't do that, but we could try to find an agreements
I mean : if you pay 50% in Currency X and 50% in currency Y and X is not BTC and Y is not BTC i will probably sell X and Y on an exchange. So, this is the same procedure you can do by yourself and pay me in BTC
Which exchanges does it work on?
The ones in the price list
Now i'm working for C-CEX exchange
Where do I find the 'purchase' link?
There's no purchase link, i will give you a personal link to your personal copy.