Is insight-api deprecated and not maintained?

I noticed that there is basically 0 activity for insight API both on forum and github. Is it deprecated? I should not use the REST API anymore?

The reason I am asking is because that I was just using the REST API to do some query along the blocks and query for quite a lot of transactions. However, after a while the bitcored process will eat up all my memory and OOM. Any idea on what could go wrong here?

I am using Ubuntu 1404, node v0.12.9 and bitcore version 3.0.0, instight-api v0.3.0.