> Many people (especially tech people) have an almost psychotic adversity against any kind of paid online services.
> who'd refuse to pay $10 per year
I've not actually seen many services that charge $10 per year. Most instead charge $5 per month / $50 per year. The few services I know of that do charge in the range of what you specify are near universally regarded as really good value.
Yes, $10 per year was just a number, but maybe not too far from the truth. I've seen estimates of $5 to $30 to $300 per user and year for sites like Instagram.
Something for $10 per year is usually a promotion, and maybe a good place to get started. Since the social media giants have been giving it for free for a decade...
> who'd refuse to pay $10 per year
I've not actually seen many services that charge $10 per year. Most instead charge $5 per month / $50 per year. The few services I know of that do charge in the range of what you specify are near universally regarded as really good value.