If you have great credit it's likely not a scam BUT.. Watch out for other "fees" that may add 2% to 5% to your balance in the form of a Balance Transfer FEE.... so you just added 5% to your balance. If it's interest free for 6 months with a 5% fee it's more like 10% interest equivalent per year...so just read the terms very carefully. Usually unless there is a very impressive promotion going on, a credit card is the generally one of the worst place to borrow from. (not counting payday loan stuff, and the mafia, of course)
If the offer seems attractive because your Credit card balance is high, To save the most money going forward consider a loan from your bank or credit union with a set term, and only put on the credit card what you can pay in full by the due date. This strategy gets you a free loan for 30-50 days every month. (Spent on the 1st, paid on the 20th of the following month. No interest due on full balance if paid by the due date) ...and if there is a dispute with a merchant, or a theft, the credit card covers you. (Unlike cash or debit card where the money has already left you and it's much harder to recall it into your possession)
Every situation is different, and people have different tolerances to interest. I happen to be amazed and in awe at the US Banking system, and I am impressed daily how much benefit you can get from using credit to your advantage. 0% same as cash is offered quite a bit on many services, and rates for auto and home are so very low. Some people think it's a sin to buy a boat on credit...but how boring it is to boat from the sofa...
On the contrary, I cannot imagine paying interest to borrow for things that are not long lasting, such as a party or trip or fancy dinner. Still paying for enjoyment that has already passed is not my cup of tea.
This is just my take, and everyone is free to decide how to best leverage available credit.
Best of Luck however you proceed!