Sponsors advertise illegal(?) services

(Not entirely sure this is the correct place, but its related to the docs, so i decided to open an issue here)

Quite a few sponsors currently represented on the homepage provide services to by followers on several social media services.
This certainly is against the ToS of those services and possibly(?) illegal. Looking at the naming scheme of the url / image it at least seems that some of the sponsors are fronts for the same service.
It seems there is currently no process for whitelisting sponsors in place.

A filtered list of sponsors currently doing this:

[
  {
    "name": "Buzzoid - Buy Instagram Followers",
    "url": "https://buzzoid.com/buy-instagram-followers/",
    "img": "buzzoid___buy_instagram_followers.png"
  },
  {
    "name": "Buy Instagram Followers Twicsy",
    "url": "https://twicsy.com/buy-instagram-followers",
    "img": "buy_instagram_followers_twicsy.png"
  },
  {
    "name": "Famety - Buy Instagram Followers",
    "url": "https://www.famety.com/",
    "img": "famety___buy_instagram_followers.png"
  },
  {
    "name": "Buy Youtube Subscribers",
    "url": "https://ssmarket.net/buy-youtube-subscribers",
    "img": "buy_youtube_subscribers.png"
  },
  {
    "name": "Poprey - Buy Instagram Likes",
    "url": "https://poprey.com/",
    "img": "poprey___buy_instagram_likes.png"
  },
  {
    "name": "Buy Instagram Followers from SocialWick",
    "url": "https://www.socialwick.com/instagram/followers",
    "img": "buy_instagram_followers_from_socialwick.png"
  },
  {
    "name": "Buy Instagram Followers Media Mister",
    "url": "https://www.mediamister.com/buy-instagram-followers",
    "img": "buy_instagram_followers_media_mister.png"
  }
]

There also seem to be quite a few online casinos sponsoring vue. While not illegal (i think) there should be a question if vue wants to place ads for services that prey on people with addictions.

Start by reviewing the homepage sponsor list and the sponsorship or whitelisting process discussed in the issue. Verify the listed concerns with project maintainers, then define the agreed eligibility policy and the corresponding homepage or process update as the completion criteria.