- Nodes have to be managed: Nodes regularly need to be upgraded every few weeks, and occasionally re-built from scratch. Individual nodes can fall behind the network for various reasons.
Do people really upgrade their server that often? I don't know for altcoin node, but you could get away doing it every few months if i use Bitcoin Core (full node client) and Debian (OS).
So instead of sending your requests to a local node, you can send them over the internet to a provider offering an identical API that is running fully-synced, up-to-date nodes available 24/7.
Just wondering, do you have any strong argument using your service rather than blockchain explorer API which offer more data since they perform additional indexing?