200/300 renders per update is Sad too much
As someone who's working on his project rn - 200-300 per month is an okayish, good number.
I have around 1200 in 12 months with reworking stuff here and there.
A lot of things come down to your PC.
If an update has a bunch of renders with 3+ characters or outfits with "heavy" textures(AJC College Uniform is good example of that - takes a huge toll on VRAM) - it would take a lot longer than have the same amount of renders with 1 char being nude.
And since this game is relatively new and doesn't have big following - I'd assume that the developer doesn't have 3090TI, at least)
So, if we take it as random working hours and 5/2 work week - 200 renders per month is 50 per week, 10 per day. Not the best number, but not the worst.