Sometimes, you may receive an offer for a free trial period.
I’d expect this to be the most common scenario that matches what you’re talking about.
For example, I just signed up with a service a couple of months ago where the 30-day trial period had a full feature set of their specific service.
The WS2812 is an unassuming RGB LED with an integrated control circuit hidden underneath.
We love the simplicity of this little IC/LED combo.
When in doubt, always assume anything that says free but requires a credit card is a scam.
Nonetheless, there are some semi-legitimate scenarios where giving your credit card information is the right thing to do.