How many sets should a new site launch with?
 

Working on a new fetish site for a client from scratch. how many sets is good to launch with in your opinion with 70-100 images per set and 3-4 vids per set

45 to 60 sets

You could even go as low as 30 if you're planning regular solid updates.

ok so lets say they launch with 30-35 sets what is standard updates these days to keep retention? 1-2 sets per week?

I set the update intervals based on the trial lengths offered. Let them to see an update and want to stay for the next one.