Right, first of all, this is a Double event and it costs 3, so you better have a damn good reason to spend 2 and 3 to save yourself 7 credits.
Except, EXCEPT, it's a double for a good reason: It's going to be 1 click to draw and 1 click to install anyway, so as long as you can keep Eureka! in hand for the right time, it's cost neutral in terms of clicks, even if that 3 play cost makes it slightly less worthwhile.
Now just comes the task of getting the card you want on top of your stack... The obvious method is Test Run. Take any program from your heap or stack, install it for free and then put in on top of your stack after your turn is over. Next turn, Eureka it out for free. If you're going to do this, may as well make it something pricey like Torch or Garrote or Femme Fatale.
The only other thing that comes to mind is Motivation. The benefit of this is that Eureka works with any card, so if you're looking at the top card of your stack every turn anyway, you can save a Eureka for something tasty like The Toolbox or Blackguard or extra style points for busting out a Shard (Eden/Hades/Utopia and popping it immediately.
Of course, the 10 discount is a bit of a red herring as very little costs this much, it's better just to think of this as an install of something for only 3. You could of course just play it outright in an low event deck and try your luck.