Marketing is difficult. I have worked at companies where I made 200 phone calls per day, every day, for months. Cold calls. Follow up calls.
People go to conferences and get booths at them to meet and greet conference attendies (before covid, or course).
People go to speaking events, like chamber of commerce meetings in order to inform, but also to let people know that they can work.
Write articles for blogs, get on TV as an expert, there's a lot of things you can do.
But generally, you can't just pin a notice on your grocery store bulletin board, or create a website, and get jobs pouring in.
The thing is, is that yeah, "you never heard back from anyone", as you write. Because YOU are the one that THEY need to hear from, over and over. Why do you think McDonalds, and Farmers Insurance and Fritos Nike advertise so much? They have to show their brand over and over and over and over and over again.
Well, you cannot afford a $200 million ad campaign. So you have to figure out your target audience and market to them, over and over, and not expect them to come and kiss your ring. I have to sometimes call 20 or 30 times to get a sale, over the course of a year. But my product's price is usually a minimum of $2,000 per month, or $24,000 per year, so I can invest the time. If you are trying to sell a survey for $20, then that might not be do-able. So what you have to do is put together a bunch of stuff that they can do into a package deal that you sell for at least $1,000 per month in monthly recurring revenue.
I don't really know how to sell low price point stuff. I think you have to spend a LOT more money up-front to market it, or else hook up with different companies that will distribute your service or product for a cut of the revenues, which is usually 50% if there is some kind of revenue split. I know a guy that sold software for $45 per pop, but he spend $20K or $30K per month in marketing costs.
When you have a $1000+ recurring sale, you can be a lot more focused and targeted in who you want to sell your product to. Maybe law firms or doctors or veteranarians or health care companies, none of them will blink at a $2,000 per month charge. But you will have to call and email 10,000 companies to get 50 or 75 or 100 sales, depending on how much they want your stuff. But if you're charging $1,000 per sale, and create 100 sales, that is $100,000 per month in ongoing revenue. Shit, even 4 sales will be $4,000 per month. But you will have to make 150 calls, every day, for 6 months to get there, and do presentations, and write content, etc.
I'd really try to figure out how to bundle as much pre-existing stuff out there and wrap it up nice and neat and sell it that way.