As a buyer I weigh up whether I think the tutorial is worth the price vs the new techniques and inspiration I am going to learn. The next consideration is whether I can afford it. I am delighted if it happens to be on sale. But the same criteria still holds true.
Therefore, if it is offered for sale later it makes no difference, as at the time I made the decision I thought it was worth the money. The fact that someone else may benefit from a sale price is great. The fact that I paid more and rewarded the wonderful artist that put all that hard work in so that I could learn more quickly is also great.
I want to encourage the artists to do more tutorials so I can also make some fantastic beads!