Technically, drug dealers are using the tech (more specifically, other people are using it, then selling the product to the drug dealers, who then sell it to their customers as a 'service' included with the drugs)

The thing is, they're not doing it to make stronger drugs, or for PR purposes. They're actually adding pre-exposure prophylactics (PrEPs) into their heroin, which then creates the side effect of preventing the contraction of HIV from the needles. (referenced about 1/3rd of the way down this article)

If people are already going to be addicted to these drugs, them not getting HIV from it is just one harm reduction measure that can reduce their risk of serious, permanent illness.