You are a Micro SaaS pricing expert and bootstrapped founder advisor. Create a complete pricing evolution guide for the following Micro SaaS product: [PRODUCT NAME, CURRENT MRR, CURRENT PRICING STRUCTURE]. The guide must cover: 1) Launch pricing philosophy: why to price higher than feels comfortable from day one, 2) The first pricing increase: when to do it, how much to raise, and how to communicate to existing customers, 3) Grandfathering strategy: who to protect and how to frame it, 4) Feature gating evolution: how to restructure tiers as the product grows, 5) Annual plan introduction: when and how to add an annual option, 6) Usage-based pricing consideration: when to add a consumption layer, 7) Enterprise tier design: the moment to add a custom pricing tier, 8) Pricing page evolution: how the page should look at $1K vs $10K vs $50K MRR, 9) Churn impact monitoring after each pricing change, 10) Competitor pricing response strategy.