Providers of done-for-you funnels often advertise outcome guarantees — a fixed number of clients in a fixed number of days. Treat these as marketing claims. Ask for verifiable case studies, check whether quoted returns include ad spend and management fees, and confirm in writing who owns the ad accounts, creative assets and collected data.
A credible provider will describe a testing phase, name the metrics they report on, and explain what happens if early results are weak. Be cautious of anyone who promises specific revenue before any data has been collected in your market.