Artists tools are always available to everybody, and mosts other tools are currently open to everyone, but some advanced features are perks for my collectors. Access is still free, as you buy the art and you can resell the art at anytime. I don't sell any subscription to the toolset. At anytime, this perk can be revoked either individually or globally, without any explanation. Again you don't pay to access the tools, you buy some art. If you don't like the art, don't buy it !
None of these tools are mandatory to sale or collect on tezos, they are only convenient and for advanced needs.