Open developer tools in your own browser and look at the network tab. Click on the requests and click Block Request then refresh (Right click refresh button and reload without cache)
Keep blocking images and scripts until the website stops working
Take that list of blocked stuff and put it in your script using Request Mask Deny
Yeah you could buy multiple keys, then save them as resource list.
Then you can use resource variable as a key, which will result in
using different key for each new thread.