I see a lot of threads promoting CPA CPI etc. My question is, if instagram is good for PPI, facebook maybe for CPA, what would be good for someone willing to sell their own stuff? for instance a watch. Taking into account the blackhat tools we have here what would be better, to spend on instagram, on facebook, on seo, on PPC ,CPM? What would be more powerful? taking into account, money spent , time to see results. Promoting PPI on instagram may cost 50-200 usd, results are seen almost inmediatly ( first weeks ) Seo would cost ??? time to see results maybe months. PPC ,CPM would cost ??? time to see results maybe inmediatly. I really have no idea so i am looking for best advice if you have experience. Thanks in advance.