Run a desk research pass that tells you which findings to trust and which to verify yourself

I need a desk research brief on the topic below. Structure it so I can immediately tell which claims are solid enough to act on and which need independent verification before I use them — do not present everything with the same level of apparent confidence.

RESEARCH TOPIC
How mid-market SaaS companies typically structure usage-based pricing tiers.

DECISION THIS WILL INFORM
Deciding whether to move our product from seat-based to usage-based pricing next quarter.

WHAT I ALREADY KNOW (so you don't re-explain it)
We already know the basic difference between seat-based and usage-based models; skip that part.

TIME BOX
This needs to be useful for a decision meeting tomorrow, not an exhaustive report.

STRUCTURE THE BRIEF AS THREE CONFIDENCE TIERS:
TIER 1 — WELL-ESTABLISHED: points that are widely corroborated or definitional, where you're confident in the claim itself even if you can't pin an exact source.
TIER 2 — LIKELY BUT UNVERIFIED: points that sound right based on general patterns in the space but that you cannot confirm are current, precise, or specific to the exact context in How mid-market SaaS companies typically structure usage-based pricing tiers. — flag these explicitly as needing a check against a live source before they're used in Deciding whether to move our product from seat-based to usage-based pricing next quarter..
TIER 3 — OPEN QUESTIONS: things relevant to the decision that desk research genuinely can't answer without either primary research or a source you don't have access to — name these directly rather than papering over them with a plausible-sounding guess.

For every specific number, statistic, or named claim (a market size, a percentage, a named competitor's practice), do not present it as fact unless you're highly confident it's both accurate and current — if you're not sure, either omit the specific figure and describe the shape of the finding qualitatively, or place it in Tier 2 with an explicit note to verify. Never invent a number to make a point sound more concrete than it is.

Given the time box, prioritize breadth of the Tier 1 and Tier 3 sections over exhaustive Tier 2 detail — a decision-maker on a tight clock needs to know what's solid and what's missing more than a long list of half-confirmed maybes.

OUTPUT FORMAT
Three labeled tiers as above, each with short bulleted points. End with a one-line summary of what would most change the decision in Deciding whether to move our product from seat-based to usage-based pricing next quarter. if it turned out to be wrong.