Disclaimer: I’ve never paid for a boost, I’m not sure how mechanics work.
I think it takes more than you probably think.
The gear system is based on drop chances and RNG, for example if you pay for a X+ KR run doesn’t mean you’ll get gear instantly.
Same goes for raids, your chance of getting 450 in one run is most likely zero; you need to remember, all raids have a lockout you can’t repeat them over and over.
You’ll not get BiS gear in one day, you can get it in a few week only if you’re extremely lucky.
If I may ask, what’s the purpose of getting carried? You pay someone else to do everything for you, you get your gear and then what? I don’t see the excitement of getting carried through content.
You see high numbers on your character page, but since you didn’t do any content seriously you don’t know how to proceed.
In my opinion there’s no reason to pay for something you can do for yourself.
Edit: misspellings.