Low Thread Count – Help needed


I have 10 shared private proxies. I choose 100 thread. I’m using a verified link list and doing only submission ( no search engine/scraping).  At the very beginning thread count was about 50-60 thread. Which was ok. But after several hours thread count decreased dramatically. Now getting only 2-4 threads. It is frustrating since LPM/ submitted/verified all are now very low.

Active proxies is showing all 10 proxies are working and fine.

Can anyone tell me how to fix it?

Here is my setting.

— High speed VPS 
— cpu usage 0-1%
— memory usage 280mb