Are You Using Synthetic Data From ML/LLM To Enrich Your Datasets ?

Hey, I recently started working with ML and needed to expand my dataset. I was wondering how common it is to use synthetic data.

Also, I noticed some companies use external services like Gretel or Mostly (for CTGAN/TVAE), but why not run models locally? Is it a cost thing, convenience, or something else?

Curious to hear about your experiences.