Yes but your Coins didn't lower ? Just your satoshis ?
if bitcoins price continue to fly up, we will get less Satoshis, satoshis amount will go lower and lower
if bitcoins price go down , your Cointiply Coins will give you more satoshis (its live conversion on bitcoins price)

Hello,
On Cointiply you earn Coins that are convert on Satoshis, its normal the convert Coins to Satoshis is less cause Bitcoin's price since yesterday increase significally (when u use faucet and ptc, more bitcoin price flys up and less rewards you will get > simlpy as that)