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awesome-priceops
Links to articles, guides and resources related to software pricing and its implementation.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I don't see why you want to avoid grandparenting. If the pricing model [2] is versioned and immutable, then keeping customers on their existing Customer Schedule [3] and then using specific migrations to move customers to new schedules makes sense and is easier than either not doing anything, or trying to track customer specific discounts and the accounting related to that.
1: https://priceops.org/
2: https://priceops.org/1-model
3: https://priceops.org/2-schedule