Do signup bonuses hurt or help you guys? It has always hurt me.

Two or three different times at different casinos I won a fair amount of money and wanted to cash out but most do not allow you to cash out minus the bonus. So basically they have always only hurt me rather than me benefit from them.
What are some of your experiences?
well at least it doesn't hurt
I was able to turn 0.005 in Lucky Flop to around 0.5 , they had nice freerolls and this 0.005 was a good help in the beginning to discover the place
but in casinos I was never able to cashout or to win form the bonuses due to wager requirements