My experience has been 10-20 days:Does anyone have any idea about how long it will take Google to correct an issue?
^^The true difference between a spam hunter and spam reporter is the forensic investigation. Taking the time to document and going as far as you can to disprove that something is not real. In other words, gathering indisputable evidence. There is a reason for having a high success rate no matter the escalation channel... time, experience and patience in some cases.
I could see this being done effectively for agencies that don't want to take the time and know you're the expert at it and you'll have a much better success rate than they will. Just factor into your price the fact that some of them will be reinstated. So if you would charge $90 for listing removal if it stayed removed, figure out what % are reinstated (say 25%) and then charge just $67.50 (75% of $90).^^
I wonder if there is a niche market for this?
Investigate, document and prove beyond "reasonable doubt" ... Yes, it's free to report, but we all know that some people just don't want to take the time to do all this work.
They would rather have someone else do it.
I'm willing to devote time to this startup, but the GMB spam forensics investigation price? Hmmm. $40? $75? $90? What's it worth to eliminate that pesky spammy competition?