We understand that the price increase caused some frustration within the community.
The rationale was to put all creators on equal footing - if we had pre-announced the change, existing creators would have benefited disproportionately by creating a multitude of items at the lower cost, thus putting new creators at a disadvantage.
In general, we see the fact that the supply of free UGC is under control as a positive - consider that an overabundant supply in the long term means free limiteds lose their value, which means they will become less effective as a promotion tool. Our job in Economy is to think about long term impacts of our systems - sometimes this means that our decisions cause some pain in the short term.