This is why I never give my CC details on so called free trials.
If truely free , they simply do not require any CC details .
Asking for CC for trials is a scam. Simple as that. Why the need for a payment method on a free trial.
Because they bet that many will forget & let it rollover into autopayments
2 very large AV Software companies were actually prosecuted in the US for the sneaky way they did autopayments on CC's
At the end of the day, you gave them your CC when signing up to Lightbox
Another POV - I don't see it as a scam at all. It's an offer from a business. Businesses need customers generating profit to survive
If you don't like the offer no one is forcing you to put your credit card in
There will certainly be a lot of "free trial offers" you'll not be able to take advantage of without putting a CC in
Personally I signup then cancel immediately, my free offer runs until it's over