My mums advice on TT DD was to be over-the-top excited when she gets it right and completely boring when she gets it wrong. It seems to be working.
We say "oh, you did wees on the deck/chair/pram etc. thats no good. wees are meant to go in the toilet" all very calmy but sounding disappointed and leave it at that.
If you are telling her off I guess thats an exciting reaction? I don't think ignore her, because she does need to be reminded that's not the right place for it, but if it's a big drama that might be appealing?
Bribery has it's place too, I agree Isaacsmum