Every reputable travel publication/blog I know of have strict editorial policies against accepting freebies/discounts/gifts in exchange for reviews/coverage. Those so-called "influencers" aren't really about serving their audience -- they strike me as just a scammy way to travel "for free".
The "influencers" reek of "I'm young, female, and attractive, and therefore i am worthy of attention and lavish gifts." Thing is, it works.
For sure a lot of them are pretty low effort and just do it as a side job, but I don't think it's as simple as just being attractive and I don't think a lot of them are as entitled as they seem.