Depends on the complaint.  Doing so here only nets interaction with other customers who may or may not be able to help as long as it isn't something that requires changing an account.  then there are other types of complaints that warrant different contacts for resolution.

I imagine the rep was referring to the discount received on out of contract phones where less than 6GB discounts $15 per out of contract line and any allotment over 6GB is $25.  Between 2 out of contract lines, up to $50 would be saved and would balance out the cost of extra data, but I have no idea what plan and amount of data you were on.