In my case, the answer is: my job pays my bills, while I work on my startup after hours. Also, as many mentioned, standard interviews are so much pain.
In most cases it doesn't make a difference if you have costs of $6 or $60 annually, it's still marginal. I'd say speed it's way important - use the tools you know.
It's better to create a startup in 6 days than for $6/yr.
Done! Your previous article is super interesting, thanks a lot! I'm a founder of a crypto trading tool startup, so info like that really helps understanding who are my customers :)