I have a few credit cards that are currently carrying some larger "promotional" balances. These are purchases that I decided to put on a 6, 12, or 18 month 0% APR financing offer vs. taking any points or cash back offers. (Best Buy being my most used card of this type.) These are purchases such as a laptop or TV.
I always pay these purchases off in time (usually a month or two early). I have been told that by only making these 0% financing purchases on the card and never incurring interest is not recommended - that I may be putting myself at risk of the credit card issuer canceling my account since they aren't really making a profit off of me.
Is this true? Should I make some smaller purchases with these cards and incur some interest here and there, or is this simply not true?