Slack integration - linked accounts

we have just migrated away from Slack V1. ( as it will be discontinued )
On the old integration (Slack V1 ) ALL Slack users was able to Acknowledge/Resolve without having a PagerDuty account.
Now it seem to require that users link their accounts.
Does this really mean that all 300+ Slack channel users, have to have a Pagerduty account ? ( my manager is not going to be happy if that is the case. Will require a big license fee increase )

Hello,

Thanks for reaching out on our community space. The changes from V1 to V2 Slack integration did include the update which meant that yes, to action any requests on an Incident from slack you do need to have a mapped Pagerduty account.

John