No. Never. It is a terrible idea. The whole Professional tier is already bad because its requirement of 100k is so low that solo indie devs in western country already count as being obliged to buy a Professional license.
Considering there is no cap on how big the price difference can be, some sellers charge disproportionally more for professional licenses, like $10 personal licenses turns to $1500 professional licenses.
You don’t pay x10 more for a Windows license if you use it in a business. Forcing solo indie devs to pay x10 more for an asset license - as if they are rolling in money, abusing content creators - is ridiculous.
FAB is already in a desperate state, and now you “urge the FAB team” to lock features and support behind paywalls. As if we currently don’t have the problem of most assets not having sufficient documentation and decent support from the seller.
Your suggestion is not a “fair approach in a free market”, but rather the opposite. It enforces gatekeeping and puts additional burdens on smaller indie devs. It encourages seller bad practices, like ignoring support requests, asset feature cutting, and content splitting.
Meanwhile, big FAB buyers will remain unaffected by those changes.
You can sell 10+ tiers of paid support and extra textures via your website or Patreon. No need to refactor the already not-the-best FAB license system for this.
I urge the FAB team to raise the 100k to 1 million for Professional licenses, just like Unreal Engine already has for years.