Those tablets containing cocaine, caffeine and heroin, is it possible they werent being sold as ecstasy but as some type of "cheese" type drug, people could easily crush up and snort, the percetnages of the active drugs (1%) are rather low. Thwey dont look like something anyone would buy as ecstasy.
Also those BZP/Piperazine pills, there are companies that press those pills, with rangles of sizes, colours, shape, piperazine contents and dosages and sell them commercially or just to anyone, in bulk. Then people are free to package them and sell them as legal party pills and make profit. Most would be of low dose to make profit. Alot of these pills are going around UK and Ireland sold as ecstasy and it is hard to keep up because of the sizes (height, width), colours, logos, etc... and they are flooding the market as ecstasy pills. If you buy them in huge amounts they cost next to nothing. Hope they dont start hitting Australia, but ofcourse they will.