Depends on how good the software is.
I'd do a CPA offer once every 15 minutes for some software. Others I'd just uninstall and move on.
Also depends on how well you "sell" the need for the offer fill.
"to keep this free, go here and fill in this offer" is a so-so reason because most people don't give a shit; they just want what they want.
"To receive a handjob from Angelina Jolie, go here and fill in this offer" would be much more interesting (if you could deliver of course

)
Actually, I just got an idea.....