During the past customer review campaign, how many requests should we send per day/ week or month, so we don't encounter any issues?

During the past customer review campaign, how many requests should we send per day/ week or month, so we don't encounter any issues?

When offering a free trial for reviews, do you cover the cost of the A2P registration? What happens if the customer ends up canceling at the end of the trial?

For review management, do you send the first request via sms then 2 reminders within the next 30 days of job being completed? @Clay Lawrence