Interesting but a lot of the information on there appears either out of date or is at least different in the US to the UK.
Obviously this is written by NG and is skewed towards their products so remember there are loads of other wax and wick suppliers as well. Many wax blends available no longer need vybar or any other additions and produce excellent hot and cold throws and are suitable for a number of different functions.
Also, dont forget that if you are selling candles or melts or any home fragrance product in the EU you must produce a CLP label for each candle etc and have fragrance and business specific SDS sheets available for each fragrance - not all US FO manufacturers are able to provide the information in a format that does not incur additional costs and it is, in general, not something the average person can do without specialist computer programs.