The other option is selling your domain if you have a good SEO score (Domain Authority) or you own a domain with a special name. My favourite social media scheduling company, buffer, bought buffer.com in $600,000 last year. In a similar way, you can buy expired domains and sell at a higher price to people who need that. Honestly, domain trading business is tricky and you have to be an expert even to start, otherwise, you may lose money.
Really good article with some great tips. Affiliate marketing has the potential to earn lots of money and I'm hoping I can make it happen. I have tried the matched betting and it DEFINITELY works. The one thing I would say is that you need to check that any bets have been accepted by the bookmaker. I have had on occasion bets which look like they have been accepted but don't register in my account. Always go into your account and check outstanding bets or your bet history.