Reply to post: a few calls a year, then there is very little towards to costs

a few calls a year, then there is very little towards to costs

But on the other hand, they are also not placing big demands on the service, e.g. taking up lots bandwidth all the time, making many calls, overloading the call centre trying to fix/update their contract, etc. The corner shop (or whatever) doesn't charge someone extra for milk (or whatever) just because they rarely buy there - but the shop still has fixed costs (staff, rent, admin &etc), to which the occasional customer contributes very little.