Slower DMCA Deletions = More likely that the file host will become financially unstable and not continue to pay its affiliates.
Faster DMCA Deletions = MOre likely that the file host will remain financially stable and continue to pay its affiliates.
There is an entire DMCA industry out there, companies that survive solely on submitting DMCA Takedowns for deletion of uploader's files from file hosts. This industry is definitely on the rise as over 100 million DMCA removals have been processed by Google so far this year, and thats as of July....
When a file host becomes non-compliant then these companies have no choice but to attack its' financial channels, usually this starts with freezing PayPal accounts, and then accelerates to freezing of bank accounts.
DMCA Deletion is an unavoidable problem so your best bet is to read up on how to scramble md5 checksum hash values to go undetected and prevent your files from being deleted based on other's links.
I will say though that some hosts will delete files from any email which means if someone has a beef with you they can scrape your links and submit a batch of bullshit DMCA takedown notifications from any old email address. I've been the victim of this when a forum jealous of mine was behind it, and experiencing this fucking sucks big time.
Proper handling of DMCA means that someone should be able to prove that they either own or are acting on behalf of the owner. Unfortunately the following file hosts have failed at this when I tested them using a mailinator (disposable email) account to submit fake dmca claims against test files I uploaded:
DepositFiles
Netload
RapidGator
Uploaded/Ul.to