I was playing demo dozens of times. I do not think it was even possible to buy it via legitimate sources at that time where I lived. Great memories when I was finally beat the first ep boss.
Prior to the DMCA, copyright violations were a grey area. In most countries, in order to seek damages a company had to show users were selling copies or using IP for promotional purposes.
Now... people are using the same RIAA/DMCA laws to hijack youtube channel content from legitimate creators. The damage to publishers is done by the time it is sorted out.
As a business, it has always been better to go after distribution channels rather than squeezing customers. =3