There are numerous reasons.
People can and do fall into a bad relationship with MDMA when not aware of the dose and risk.
I've seen people just try to keep the high going for 12 hours... by redosing. It ends up having no to little effect.
There are biological/mechanical effects of the habituation to MA and A.
One guy in the outer-circle of my friends, has/ is been addicted to everything.
With MDMA he would go on 3 day s, last day dropping 4 at a time

,
more then 1 time. Wonder what he felt, he always acted a lot.
Then would switch to Amphetamine, which cost less then a pill per gram.
So he d carry on, tweaked and on Weed. Till next Friday,
or after getting paid or doing a hussle. And repeat, and he wasn t the worst.
His finance, the Bottleneck, dealer s i knew but hardly used.
Never get high on your own supply ! They did, and very good at it.
These sold at Tekno event s, so they had excess in Drugs.
There sister still alive and had a kid, and seemed mental OK, not e-tarted ?
After devouring 100-rds of pills, no internet. No Harm-reduction yet.
My experience they sold, if they had em, shitty pills and cut Coke.
So the good pills they sold to friend s and at party s.

Only thing good, they got me 2 LSD blot s from UK on re-guest.
Which is the only time i was able to buy it.
The other 2 blotter s i got where gift s.
And their Speed was good.
