People can be skeptical of a lot of SEO practices. Is the method of payment one of them?
A user posted on SEO Chat yesterday - they'd just come from a LinkedIn discussion where someone had said: "We do SEO for several clients and once we do the initial work, we only need to analyze it from time to time. Any monthly contract is basically a scam." Here's a link to the thread.
What do you think? User ThomasHarvey writes that "They're kind of right, and in a way it's how most SEOs work. My personal working process is do a site audit, analyse what needs to be done and create a prioritised list. Complete that list. Wait to see the impact of changes and then repeat...What a monthly contract does offer you though over a one off payment/audit is the contract with an seo. You can ask them whatever questions you may have..."
Another user, Pierre Benneton, writes that he uses both types of payment - one off and contract - depending on the project. That sounds sensible to me - I don't believe that there's necessarily a line in the sand when it comes to payment types.