Sales are on every plan
No plan unlocks sales, and there's no extra charge to turn them on. You see the fields in Gallery settings and the Connect payout account button the same way on Free, Pro and Studio.

The fee doesn't depend on your plan either
The 2 percent fee on card payments applies to everyone. A higher plan doesn't lower it, and a lower plan doesn't raise it. Direct payments have no fee on any plan.
What your plan actually limits
Your plan sets the scale of your work, not your sales:
- number of galleries and clients: Free gives you 3 galleries and 10 clients,
- photo storage: 2 GB on Free, 50 GB on Pro, 200 GB on Studio,
- branding: your own watermark, your own logo and a custom email template need Pro.
When sales may not be available
The only time the sales section disappears from Gallery settings is when we turn it off for everyone on our side. In that case, on the Billing & plan page, the Photo sales row shows Soon instead of the button. It has nothing to do with your plan.