Bol.com: what is "MijnLeverBelofte" in the shipping time mapping?

When mapping the shipping time for a bol.com channel, you might notice an option in the drop down menu labelled "MijnLeverBelofte". This option is part of a pilot program run by bol.com in which you get the option to select your delivery options and cut off times in the backend of bol.com, allowing more control over your specific delivery dates and shipping time. According to bol.com they select the participants of the pilot group and there is no way of registering for this option.