Anything relentlessly advertised, while not necessarily a scam, needs to be viewed objectively.
My most recent experience of this is Pure Cremation, which is aggressively marketed via TV advertising and mailshots as a low cost alternative to a traditional funeral.
We had a family discussion last year with a very elderly relative, a lifelong avoider of funerals; he was insistent his body should simply be cremated and his ashes scattered with those of his late wife, whose ashes he had kept safe for four years. Morbid, but practical, and when the time came last month I was tasked with arranging his cremation.
It was his niece who was at his side in hospital when he died, and somehow the topic of his funeral came up at the time and she mentioned he wanted a pure cremation (this is relevant).
I rang various undertakers for quotes and eventually appointed an independent company in Bristol, where he lived. Having completed the paperwork and returned it, I received a call from them a couple of days later. They'd gone to collect him from the hospital and been told it was Pure Cremation who'd been appointed. Confusion reigned for a couple of hours.
It turned out his niece, having heard only of Pure Cremation (the company) through their advertising, didn't realise pure cremation (the process) is offered by many undertakers.
Pure Cremation's quote was in excess of £1600, I paid £975 for exactly the same service.
DYOR often offers significant savings.
(Edited for "fat fingers".)