(Of course, you can also always get passive income by buying-and-holding US Treasuries, which are paying out around 4.2%. The BLS just reported inflation at 3.6%. No one's going to get rich with that level of passive income net of inflation. And according to Shadow Government Statistics, the real rate of inflation you and I are actually experiencing---including at the grocery store checkout line, at the gas pump, and at the doctor's office---not the massaged statistics the government puts out, is actually much higher, perhaps up to 11%. So government bonds could actually be not passive income---however meager---but passive losses.)
There are hundreds, if not thousands, of websites offering users the ability to get paid for taking surveys online. Same as with Cashback sites, if you encounter a survey site where sign up if not free, simply avoid it. I have not checked it myself, but a few online entrepreneurs suggest trying toluna.com. Also, you might want to try Cash Crate - In addition to getting paid for taking surveys, they offer cachbacks and other quick online income perks.
Part of providing value is building trust. Don’t link to things that aren’t of good quality or people won’t trust your recommendations. The other part of making an audience is consistency. It matters less how often you post than how consistently. If you only have time to do one post a month, that post should come out on the same date and time each month.
Once your audience has grown and you have validation that you’re offering them value, there are many ways to create passive income. You could sell digital products like ebooks or courses, take up affiliate marketing in which you promote other company’s products and earn a commission when you sell that item to your audience, build a community and charge people to be a part of it, create software and sell that, among other avenues. Ask your audience directly what would serve them best, or look at what they’re saying on Twitter, Facebook or other websites, to find out what problems they have and how you could help solve them.