Will Dean

The test, `test_distribution_customer_churn_time `, is now failing. Would you know anything about this @ricardoV94 ? Maybe @ColtAllen

Closing as #632 introduces the `mock_fit` in the test suite. However, I've create #721 to follow up with some of the efforts here

I just brought it up since #267 isn't very clear in my eyes and a custom MMM with a config like ours would require this functionality. It can stay as...

Just related. Not the motivator. I just oppose putting it in ModelBuilder method because I use this elsewhere as functions that I had to copy. I haven't fully warmed up...

Realizing also that [this list of distributions](https://github.com/pymc-labs/pymc-marketing/blob/main/pymc_marketing/mmm/delayed_saturated_mmm.py#L246-L257) could have `Beta` as it has as [`mu` parameter](https://www.pymc.io/projects/docs/en/latest/api/distributions/generated/pymc.Beta.html) EDIT: This is expanded in the Prior PR

Could be good with #742

Some were address. However others need to be changed as well tests for actual fits with mark of slow

> Yes, I updated it and still get the same error. There is a error-like warning message before the actual Python error. It's too long for the comment, so I'll...

Thanks for starting this PR @JakePiekarski314 Give the new version a try and let us know what you think. If you have a take a prior defaults, please let us...

I suspect this should either be optional as I see many users not having access to this data. And/or the optimizer is generalized and allows a user to provide arbitrary...