I have done a decent amount of marketing for several companies, I've been a data scientist and now I'm a software engineer. I am currently trying to get traffic

I have done a decent amount of marketing for several companies, I've been a data scientist and now I'm a software engineer. I am currently trying to get traffic to my side project http://www.careerminer.co http://www.careerminer.co I have tried: email marketing, social media posting, reddit posts / sub reddit comments My last job I worked at a lending company and we would spend like $10,000 on a direct mail campaign and it would result in like 50 website sessions. We kinda shot down blogging and content SEO stuff as to vague with unpredictable results and the few blog posts we did had like 10 sessions. We focused on email marketing, cold calling, paid ads and direct mail. We would spend like $50 per session on paid ads. But heres the kicker. Before the company stopped operations we decided to give content SEO one last shot, we went after long tail keyword content pages, stuff like "what is a good apr" we saw our competitors doing this. All our previous blog posts were like "mini profile : meet joe blogs founder of joes coffee" which never really generated much traffic, it was way to specific and people just don't google that. Its been a year and I still have access to GA. I looked at it and those long tail keywords pages that we went after are absolutely crushing it like one is generating 1000 new users every month (which I know is still not huge but for a small lending company (boring) its huge) and here is the double kicker, we got a text broker https://www.textbroker.com/ https://www.textbroker.com/ to write each post for like $50. So 1000 a month recurring for $50 or like 1 session for $50. Its just crazy. I listened to https://www.indiehackers.com/podcast/038-dawson-whitfield-of-logojoy https://www.indiehackers.com/podcast/038-dawson-whitfield-of.... >So our first like five months, our growth was 100% fueled, apart from Indie Hackers, by AdWords. We would spend $1.00 to acquire a customer and about four days later, we would get a $1.10 >Now-a-days about 55% of our new users come from organic SEO, we've really pushed hard on that I feel like this has been my experience with so many companies and friends. But agree with the general sentiment that if you don't have a really clear strategy, keywords, topics etc it will be a "waste of time".