Summary: ColorHippo reduces free credits from 30 to 15

Why It Matters: This change makes it harder for new users to try out ColorHippo for free. It might make fewer people sign up.

What Changed:

• The number of free credits offered changed from 30 to 15.
• The payment processor for credit packs changed from Gumroad to Polar.
• The link for buying credit packs changed from https://app.colorhippo.com/ to https://app.colorhippo.com/upgrade.
• A new sentence "ree credits." was added at the end of the content.