been using yelp for a few home repairs. the most important thing in yelp is ratings. and nostr will have that provably and in a decentralized way. nostr may disrupt all the ratings based businesses on the planet. web of trust may eventually be carried to nostr.
Discussion
There is a huge possibility for spam and fake reviews here. Right now it is not a big issue but if (more like when) nostr grows it will become a bigger issue. There needs to be some sort of human verification.
thats where web of trust comes in rescue. not everything has to be included and thats fine.