I would have to say the dealers do earn alot from the screen protectors alone. profit easily more than 300% each. But this is their business and their earnings.
Personally I brought in my own GP as well for my Note 4. The sides have bubbles but I dont think any of the manufacturers would had thought the screen was slightly curved.
In my opinion, dont bother to go gamble for a perfect one. Either just get a cheap protector and use for the time being and wait for the "perfect" one to release then hoot.
BTW Adix bro, talked to you and deal with you before. Have to agree that you are friendly and thumbs up for service. I dont think its wise to criticize p2m upfront here as it would seems its due to rivalry thats why you bad mouthing them..