This tool claims to get recommendations of email subject lines from 50 people in less than 4 minutes

So I came across this email subject line testing tool, Subject Line Testing which claims to provide recommendations on up till 6 subject line examples from 10-50 respondents in just 4 minutes. How could they be pulling it off? It is crowdsourced? I did a test run as well and this is what I got. ( seems nice but I kind of find it hard to believe) Thoughts? https://preview.redd.it/oow07nfocrd41.png?width=737&format=png&auto=webp&s=551b1d7272b223fcedee4c445d5461bff37aa6b3 submitted by /u/Tracy-Stafford [link] [comments]

source https://www.reddit.com/r/Emailmarketing/comments/evqj1j/this_tool_claims_to_get_recommendations_of_email/