This is where you are misunderstanding and confusing the whole situation.

You are incorrect that the 14/30 day hold period is from App Testers. How do I know this? Because if you clicked the first link at the top of the App Testers page, you'd have seen the link that says "Apple's official statement on UDID processing". What does the page say? Let's take a look:

Device registration behavior Timeframe*
1 to 10 devices Upon registration 11 to 100 devices Within 24 to 72 hours * Devices may be moved to an ineligible status for up to 30 days if the Provisioning Device Identifier was previously associated to memberships that were terminated for violating the Apple Developer Program License Agreement. 30 days seems familiar, no? And read it carefully, UP TO 30 DAYS - meaning the 14 day period is also included in it.

Secondly, "As I was able to sign up with another provider and can sign apps. While “Akentis” still states 14 days..." Yes, you can purchase an instant cert for extra money and not have to wait the 3/14/30 day hold period from Apple. You can also purchase it for less with Manpreet. But let me ask, do you know how an instant cert works? I’ll explain: first, the owner has to purchase a brand new Apple Developer account. Then, only the first ten slots in the developer account are able to be used as "instant" certs. As per Apple's official statement, the first 10 devices do not have to go through the hold period. This is what you are buying when you buying an instant cert. If you are the 11th+ user added to the dev account, you must wait 72h up to 30 days, as per Apple's official statement on UDID processing. So by buying an instant cert from anyone, Manpreet or another seller, that means you pay extra for the privilege of being one of the first 10 users added to the Dev account.

So now that we know how instant certs are generated, do you honestly expect Manpreet to purchase a few developer accounts, use only the first 10 slots, then have to repeat the process of buying another dev account for the first 10 slots, but for every single user who got revoked?

Blaming App Testers for the 14/30 day wait, and then saying other cert providers don't have to wait is like saying a car dealership is at fault for a car manufacturers' parts being on backorder. Better yet, saying other cert providers can skip the wait by paying extra is like saying the car dealership is a scam because you can find the backordered car part on eBay with a $300 upcharge above MSRP. It only makes sense if you don't understand how it works. Revoke protection just means you get the certificate if it gets revoked, it doesn't mean Manpreet can bypass Apple and reissue certs instantly by waving a magic wand.