A lot of big companies, even in 2017, don't have a very good in-house process for buying software that isn't available on CDROM from a preferred distributor (CDW, etc...)
One place I worked, it was easier to order a new work van for the department than a $30 program because the program could only be downloaded, and not bought in a box.
The reason is kickbacks. The CxO level gets either direct kickbacks (or, in holding company layouts, the mothership company) or by invitations to golf weekends.
So they try to keep people from buying from non-approved (i.e. no kickback agreement) vendors as much as possible, no matter if the company loses on the long term (worker happiness, productivity). Also, keeping records, both financial and stuff like license expiration is easier with one to a dozen suppliers than hundreds. The major enterprise vendors (eg MS, Adobe and Acronis) actually have dedicated enterprise license management solutions, which a tiny shop usually does not.
One place I worked, it was easier to order a new work van for the department than a $30 program because the program could only be downloaded, and not bought in a box.