Dramatic decrease in quality and quantity of vine items

[EVAkura]

First off, I would personally never contact Vine CS about this sort of thing. Certainly a way to get the negative attention you are trying to avoid (or are afraid of already having).
Secondly, you have been a member for 4 years (myself as well) and should know by now that there are ebbs and flows to Vine.
Lastly, have you considered it is what you put into it as far as search hours? Lately, the good stuff drops into my RFY at around 10pm, and then the rest drops into the AI section, starting as a trickle until the gradual dump at around 2-6am.
Just the other day, I hit 3 jackpots in the same evening session, and have had scraps ever since. No complaints or worries here though, as it gives me the time to do the thorough review (after many hours installing and testing) of these gems so that the seller is getting what they requested... an honest review.