Are all those people buying from (now illegal) head shops now struggling to feed their addictions?
Context - ban.
A blanket ban on so-called legal highs has come into force in the UK.
Laws criminalising the production, distribution, sale and supply of what are otherwise known as new psychoactive substances began at midnight.
The chemicals, sold under names such as spice and black mamba, are designed to give users the same effect as drugs like cannabis and cocaine.
Last year legal highs were linked to more than 100 deaths in the UK and a rise in violent assaults in prison.
Will ban on legal highs work?
Offenders who break the new laws will face up to seven years in prison under the Psychoactive Substances Act.
Police will also be able to shut down "headshops" - stores which sells drug paraphernalia - and online dealers in the UK.
However, there have been warnings the ban could drive the sale of the drug to the so-called "dark web" - a largely untraceable area of the internet that does not show up on traditional search engines.
A survey by the YMCA charity - conducted ahead of the ban coming into force - also suggested two-thirds of young people who currently take the drugs are likely to continue using them in the future.