Hubspot has been operational in my organisation for about 2-3 years, we have about 7 products (brands), operate across the global and have about 10-20 marketers.
Each of the marketers can request lead scoring rules to be added and is usually required when a new piece of content is available or when a specific CTA requires points on particular campaigns.
The 100 rule limit per product / brand is not sustainable to as a lead scoring platform.
This request has been previously raised in 2017 (point 4) and we are requesting this 3 years later - https://community.hubspot.com/t5/HubSpot-Ideas/Major-Improvements-Needed-for-Hubspot-Scoring/idi-p/13232#comment-on-this