Results 1 issues of Nuras Nogayev

If you read [example](https://github.com/google/lightweight_mmm/blob/bb1c1a898b7411d50be54353fa94570caf373572/examples/simple_end_to_end_demo.ipynb#L1328) and [code](https://github.com/google/lightweight_mmm/blob/bb1c1a898b7411d50be54353fa94570caf373572/lightweight_mmm/optimize_media.py#L276), then the budget is media data (impressions and clicks, for example). But shouldn't it be advertising costs?