There are several types of Blackhat methods and they do work if you use properly and it is for short time. We all see people still sell links on blogs through guest posts, even though Google banned such thing.Ahh, so just use the Blackhat techniques in the beginning to give you a boost, and then stop doing and let it grow naturally. That is a good idea. If you have quality content and products that you believe can help people, then I see no problem with that at all. It sounds like a good way to allow yourself a chance to be heard or seen in an over-crowded marketplace!
Try once and see for a waste domain, then you know the taste of the Blackhat technique. Yes it is to startup to boost anything even social media likes, share etc. Some people are still using until the website is banned.