Have been implementing multiple growth hacking strategies for BlockSurvey over the last few months, and one such thing is "Life Time Deal". It began on Dealify last week and is now nearing 100 signups. What I gained from this experience is that it enabled me to streamline the support, requirements and road-map based on customer interactions. All this over a weeks time felt like a product launch again. The money that is raised through this is small though but it is definitely going to be helpful.