How I hacked sales: write about people who don't buy from me

I am a techy. I don't know how to sell. But everyone needs to sell: to get a job, to get people sign off on your project, etc. In my case, I am a data consultant. I need to sell to get hired for future projects.

Recently, I decided to try a new strategy. I write length articles about people who don't buy from me--or put in another way, people who don't buy my services. As a start, I wrote this: https://my.caura.co/why-build-software-in-house-not-f3c9bc726b1

for someone at Criteo inc., who I thought would be a good candidate for my services.

What do you all think?