>Creating a subsidiary business for every type of Google account you have would be quite expensive,
Do you really have to create a separate subsidary business? Why not just get another EIN for the account? Then as far as the online service is concerned, that will be another taxpayer id, unlinked to the original one.
The IRS does have limitations[0] (you can only apply for one EIN per day), but as far as I could tell, there is no limit to the number of EINs you can get for your company.
In fact, I would argue that if you are a self-employed person, you should get an EIN and use it when creating accounts at any SAAS that require a social security number.
Do you really have to create a separate subsidary business? Why not just get another EIN for the account? Then as far as the online service is concerned, that will be another taxpayer id, unlinked to the original one. The IRS does have limitations[0] (you can only apply for one EIN per day), but as far as I could tell, there is no limit to the number of EINs you can get for your company.
In fact, I would argue that if you are a self-employed person, you should get an EIN and use it when creating accounts at any SAAS that require a social security number.
[0] https://www.irs.gov/businesses/small-businesses-self-employe...