Given the situation described in the question, it would not be a good idea to use Jaccard distance. This is because of the limited products offered. As stated, if 4 options are offered then the values used to determine Jaccard distance would be extremely similar if not the same. As a result, this causes the data to be more symmetrical. In other words, if one product is removed from a specific transaction, then it is possible this correlates to the absence of one of the other products. In addition, using only 4 products indicates using Jaccard data may give an outcome, but won't necessarily be effective (due to the small number of options)