Consider, Alice has published a blog. Bob likes Alice's blog and visits regularly.
Alice wanting to recoup her costs puts ads on her website. Bob doesn't like seeing ads, and since he's tech savvy enough, he has adblock. Alice doesn't get ad revenue from Bob's visits.
Bob would like Alice to get paid. He would be quite willing to pay Alice. If Alice has a Patreon account, he can tip her there. But Alice doesn't have Patreon.
Manqus is the connecting glue to let Bob pay Alice.
For $60/month Bob can browse the websites Bob loves ad free, and know Alice is getting paid what she used to be paid by Google AdSense.