If you can get enough freelance projects to do then you could potentially earn $100.00 per day doing freelance work.
But you will have to invest time so it really is not a no investment deal nor is anything you do to earn money.
Many bloggers and website owners make $100.00 per day through advertisements and affiliate programs or selling their own product or service.
But you will need to invest time to get the website up and running and invest your time to write a lot of stellar blog content that will get ranked high in search engines to get search traffic.
You can start a blog for as little as $50.00 per year in the beginning.
Hosting usually costs around $40.00 per year for small blog and a domain at most $10.00 per year.
You certainly can start a blog for less than $100.00 per year and potentially a few years later earn $50.00 to $100.00 per day and in some cases even more depending on the traffic your blog or website gets and how much work you put into the website or blog.
If you can find affiliate products or services to promote that earn $100.00 per day you would make $100.00 per day by selling one of those services or products per day.
It can be done but you need to invest time at least into this venture if you want to make money online.
There's no easy way to make money online and everyone who is making money online worked hard for years to get to where they're now.