We were having the same discussion earlier in the week on the SVO Mustang site. I had Hagerty on my vert but dropped it since not driving it. I think I had $20,000 on it and cost $227.50. They want to sell you up on value to get more money. I only paid $7,200 for the car. They put the value on it from pics I sent.
It varies state to state for cost per $1,000. They will stick on roll back or road assistance unless you tell them not to. I have AAA so I did not have it.
Another think on my Hagerty policy all the paperwork has their headers but the actual company that has the policy is Essentia Insurance. Hagerty does like the banks and sells your policy like a broker. You may or may not have Hagerty depends on where you live also.
One of the members in the SVO group is an attorney and he says it is common for insurance companies to share with other companies. He said the do a lot on big life insurance policies.
One of the parts cars I bought was a crashed 72 vert. It was a one owner and they had $35,000 on it until a couple weeks before the crash and they had dropped to $16,500. So the insurance company gave them the car and the $16,500 and a clear non salvage title.
If you ever do have a crash do not let them take the car to a garage or tow area. They will add on a storage fee of $75 - $100 a day. Have it taken to your home. The other reason if the insurance company totals it and they have it in storage they also get the title and make it a salvage title if you buy it back. If you keep the car in your possession and never give them the title it will stay clear and not salvage. The car in the video slide show attached came with a clear title not salvage. I did part out the car most is gone still a few great pieces.
So no matter who you insure with you might still end up with another carrier.
https://animoto.com/play/oOVM1VhjrMPL8aPe9lUj3g