Bulk uploading will flag your story as spam for a day or so. What it does? You are hidden from latest updates. Why is it bad? You get majority of your views and readers from latest updates. How long does it stay hidden? A day or so. Also, the initial boost you get from being both in latest update and latest series can maker or break a story.
You can upload multiple chapters a day, but to be safe, it's better to spread your releases. You post one chapter, you wait for at least a couple of hours before posting the second chapter. Ideally 4+ hours.
Ohhhhhhhhhh, thx. I was wondering why my series didn't show up in the latest series post this time. Last time I started off with 5 chapters. Anyway thank you for letting me know.