Freelancing Platform:

upwork
Freelancer
fiver

affiliate marketing:

Amazon Associates
Shareasale
clickbank

content creation:

YouTube (earning through ads and sponsorships)
Blogging (through advertising revenue, sponsored content, or affiliate marketing)
Online Courses and

eBooks:

Udemy
teachable
Amazon Kindle Direct Publishing

Stock Photography:

Shutterstock
adobe stock
iStock

Paid Surveys & Reviews:

swagbucks
survey junkie
Vindale Research

Remote Work Job Board:

remote is fine
we work remotely
flexjobs

Virtual Assistance:

tighten up
time etc.
Upwork (for virtual assistant roles)

Cryptocurrency Trading:

Binance
coinbase

Social Media Management:

Provide services on platforms like Upwork or directly to clients.