The steps I mentioned above are what, maybe a few hundred dollars. Trust me, their lead generation pipeline most likely already subscribes to this and utilizes it with minimal concern.
There are plenty of CRM tools that can flag out BS domains and/or low value not worth it domains.
If you are a person who gets by using 10minuteemail, you are not their target market. So will their target demographic.
The extra hop is very necessary for prevalidation. And they will be just fine with it.
You on the other hand, being the cheapskate that you are, have to commit an extra 5 minutes every time you generate these BS emails. Obviously you don't value your time as much. And that is why, again, you are not the target market because you extract no business value from accessing the knowledge they spent time and money aggregating for you. Your getting the PDF is inconsequential to both them and yourself.
So go ahead, no one really cares.
EDIT: Lol, you was not referring to you specifically, just the folks who think they are being smart or outsmarting corps by using these services like 10minutemail or whatever it's called