

Fairly certain what you describe is what they meant with inflation proof, compared to a fixed price.
In any case, I imagine most Patreon creators have over time adjusted their reward tiers, or gathered more Patreon supporters to keep up with how Inflation affects their costs, thus giving more to Patreon. Both the company and creators would benefit here.
Instead, increasing the (average) percentage just helps the company at the cost of creators. To make their pay keep up with inflation, they still need to either increase the number of supporters or the price of rewards, so the company benefits doubly. Edit: forgot, this change is currently only for new creators. Existing accounts do not need to adjust their pricing (yet)
There seem to be enough alternatives that only charge a 5% fee, so this might just lose Patreon money if enough Creators see this as a step too far.
For purely economic reasons, the less often I need to buy it, the more I allow myself to splurge.
So vegetables and my go to drink I consume everyday are bought the absolute cheapest, but that spice blend for those veggies lasts me months so I really don’t care if there’s a cheaper alternative.
Of course, expensiveness is measured per kg/litre, paying a bit more up front is always worth it if it means a lower price per kg (if you can consume it before it goes bad).