X is always cut. That’s why it’s X. It’s supposed to be MDMA + something, but sometimes it is just chalk, like you said, and sometimes the MDMA is replaced a shitty upper. I haven’t found research chemicals in many of them, but it definitely happens. I had some great Chicago Mints with 2CB once.

Acid you buy on dance floors will quite often be laced with some sort of upper, I assure you. It’s just better for party scene entrepreneurs. I’ve had a lot of those and a lot plain. I prefer the latter, but I get why they do it…