Ecstasy

"The man, known as Mr A in the report in the scientific journal Psychosomatics, started using ecstasy at 21. For the first two years his use was an average of five pills per weekend. Gradually this escalated until he was taking around three and a half pills a day. At the peak, the man was taking an estimated 25 pills every day for four years. After several severe collapses at parties, Mr A decided to stop taking ecstasy. For several months, he still felt he was under the influence of the drug, despite being bedridden." [via Guardian Unlimited]

This leaves me with two questions:

• How does a person function on that much ecstasy?
• Given that he was doing so much ecstasy, where did his money come from?