Fortunately there are many block explorers on the Internet. I also encountered this when I'm requesting a loan yesterday, and it makes me can't confirm the loan instantly. So I used another block explorer and so to confirm the loan. This feature (of blockchain.info) was intended to prevent spamming, however it causes inconvenience to us
![Sad](https://bitcointalk.org/Smileys/default/sad.gif)
Hopw they can increase the maximum concurrent request per endpoint.