If the vote is traded, it is a net 0 swing for any party involved. This tool was created with the explicit intent of gaining Hillary votes in battleground states because Trump is such a real threat to this country (and others).
Personally, I do not like Hillary as a presidential candidate and oppose many of her views and stances. However, I would much prefer her in office than Trump. I would love to see a true 3 (or more) party system in the future, but at this point in time you need to be realistic and direct your efforts where it make sense.