We do not use their time stamp.
What time stamp are you using then?
We run a full bitcoin node and use it as the authoritative clock/transaction order
Actually blockchain.info has a very limited api and has gone down many times. We want our system based on the actual bitcoin blockchain, not a third party.
What is missing in the blockchain.info APIs? Your could create a lot of more trust, if you use a system (e.g. blockchain.info), we can easily follow. Even the clock there is always correct. I played ponzis for a longer time and till now i never saw any time lag. Sometimes the confirm takes longer, but the timestamp was always correct.
Why use a 3rd party api of the blockchain, when you can use the real blockchain? Take an address and compare the times and transaction orders between blockchain.info and blockr.io. They don't match 100%. We make sure our countdown timer is synched with our blockchain time. The true transaction order/time are directly taken from our node and displayed on our site.