“…On the other hand, the issue of managing supplementary products is referred to as marginally. Few related publications especially concern the following fields: economy (Freijer et al, 2019;Royne et al, 2014;Mason et al, 2011;France and Bone, 2005), business (Cong et al, 2020;Mason and Scammon, 2011;Bolton et al, 2008), sociology (Stevens et al, 2020;Smith et al, 2010;Addis et al, 2005), management (Toukabri et al, 2019;Ozcan and Gurses, 2018;Smaiziene and Vaitkiene, 2014), ethics (Outram and Stewart, 2015;Slashinski et al, 2012;Ling, 2004) or business finance (Cleff et al, 2018).…”