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Theme
Carbon38
/
History
Carbon38 rate history
21 days
90 days
1 year
All time
Cashback · by portal
Hoopla Doopla
Simply Best Coupons
Rakuten
TopCashback
Active Junky
FatCoupon
Mr. Rebates
Price.com
10%
0.50%
Aug 8
Aug 29
Points · by portal
Rakuten (Amex) (Amex points)
Rove Miles
6
5.70
Aug 8
Aug 29
pts/$
Changes in the last 21 days
10 older changes are outside this window.
Date
Portal
Change
Aug 14, 2026
Price.com
first seen at
0.5%