I'm pleased FL is mentioned in the Guardian article as I think they escaped lightly not being looked into in the recent TV documentary.
FL is one that I feel pops up in the sort of places, and has the type of products, that can target all ages of unsuspecting customers including the elderly. It's also a name that's been around for longer so may be thought of as a "safe" brand.
For example my MIL who is in her 70s bought some aloe gel from a bot at a craft fayre (don't worry I've now told her about MLMs so there's no way she would buy from them again!).
The sort of products sold by Valentus, Younique etc are more likely to appeal to the younger market not so much the elderly.