How do you increase you hashes if you have newly registered

Not sure I'm fully understanding question, I'll try to reply to all interpretations:

1. How new user affects pool mining speed?
   Currently 73 users exists, 48 tried to mine at least once. Only eight users were active in last 24 hours, daily average pool speed was 150 H/s. So average active user speed is about 20 H/s.

2. What if new user want more hashes?
   Currently only one way exists, mine more hashes with coinhive script. Also mining can be done on tablets and phones, but be careful. Mining produces heat, heat can damage your phone or tablets.
   Also I can add bonus hashes when a user is facing a problem due to my fault. That was once currently, when burstcoin transaction was lost.

does it run in the background

Mining begins only after pressing the button on the miner. No background mining, but user can leave mining in background tab after beginning.

Mining with mining link also requires pressing button to start.