>Is it easy for you to rely on more search index providers, what are your options?
I have a few options:
* Switch index providers. For example, Mojeek has an index with 6bn pages and has a web search API; may be more sustainable to switch to their index in the long run.
* Build my own index. This is my preferred option and I've already started to work on this.
* Look for funding sources to offset the price hike.