We will not promise a ranking. Other companies decide what appears on a results page, and they alter their minds without warning. Anybody guaranteeing you a position is either describing something they own or measuring something worthless.
We will not promise traffic or revenue. Same reason, plus the small matter that the result also depends on your prices, your market and whether you can actually handle more work when it arrives.
We will not promise a timeframe. Gains accumulate unevenly rather than in a straight line. We can tell you what we observe this week. We cannot tell you when a competitor will drop out of a position.
We will not take a subscription we cannot justify. When a site is too young, too damaged or too static for a weekly review to be worth $100 a month, we say so plainly. Turning work down is not a tactic here. It is the only reason an acceptance carries any weight.
We will not blame you for our own mistake. When a recommendation of ours fails, the following week's report says so and explains what we are changing. A process that never admits an error is not measuring anything at all.
We will not pretend a rebuild is never the answer. Sometimes it is the answer. Where a site needs replacing rather than improving we will say so and decline the work, because weekly advice layered onto a foundation that should not be standing is simply your money spent badly.