[rm_-rf_slash]

If a customer requests a changelog in advance that’s one thing (should be as simply as fine-copy-paste-email), but setting up a preview sandbox is work that should be negotiated by a contract if it wasn’t already signed or in the terms of service.

[zerkten]

You are right that previews can be a time sink. It justifies some strategic thinking because the blast radius can be big.

Someone can forget to have a separate set of terms and suddenly the support team are on the hook for supporting previews to a greater degree than expected. If features aren't locked then suddenly features get jammed in because the preview is a good hook for customers who haven't yet acquired your product.