Types of promotional offers

A prepaid project as itself is a special condition for purchasing tubes. So, there are two dates (the date of the start of work on the project and the date of the end of work on the project, which are indicated in the description next to the tube on the site). During this period, the tube costs 1 dollar. At the beginning of work, a sketch appears on the site. During the work on the tube, intermediate stages of work may appear. Upon completion of the work (this is exactly the date indicated as the end), the tube is sent to its customers.
After a few days, the tube is published in the main catalog on the site and costs 1.85$

An exclusive tube is a special tube that customers can receive during the offer period. Usually, such a promotion is held once a month. Terms of the promotion - buy 3 or more tubes in one order and receive an exclusive tube as a gift. An exclusive tube is unique and is given only to those people who participated in this promotion. After the end of the promotion, the exclusive tube is removed from the site and will never be sold or given away anywhere.

Offer "Buy three - pay for two". The terms of this offer are simple - you add three tubes to the cart, pay for two. But there is a nuance in this promotion - if you buy more than three tubes and want to save money - do it in different orders (features of the script). That is, one order - paid for two tubes, the third one is chosen for free.