If you are pursuing option 1, then you will want to use an automated service for the reasons mentioned in the article. Follow the process in the article to see which registrar the domain name is located at. If it’s at a Auction House like GoDaddy, NameJet or SnapNames, I believe they publicly share if there is a backorder on a domain name but not who placed that backorder. (Any interest in a domain name may be enough for someone else to place a backorder, thereby driving interest in the domain name that may be visible to the registrant.) So if the domain is at a registrar partnered with one of these companies, then you’ll have to monitor it manually (via calendar entries based on the whois expiration data) to maintain your distance.
The other way you could profit off expired domain names is redirecting the traffic to your affiliate link. For illustration, if you have an affiliate link that sells beauty products, and the expired domain name was mentioned or ranked in a high authority website for terms related to beauty products you can redirect the traffic there to make sales. One sale is enough to make you a decent profit.

ExpiredDomains.net gathers all the information you need to find good Expired Domains that are Pending Delete and you can Backorder. Depending on the domain extension you can search through thousands of domains every day before they get released to the public and pick what you like. ExpiredDomains.net currently supports 473 TLDs. From the classic gTLDs like .com, .net, .org to Droplists for ccTLDs you can only find here and now we even support some of the best new gTLDs like .xyz and .club.