New features first on Plus and Pro
When we add something new to Ideario, Plus and Pro can get it first, before it opens to everyone. It shows up on its own; there's nothing to turn on. In What's new, it's marked Plus and Pro first, so you know why you have it.
On an idea someone shared with you, the idea's owner's plan decides, the same way it does for Ideario Intelligence. If the owner is on Plus or Pro, everyone working on that idea gets it there, whatever their own plan.
If you move to Free, those features go away until they're out for everyone.