Unfortunately, as mentioned in the other posts about this topic and as mentioned in Airtable’s support article on the topic:

• You can only add up to 50 automations to a base. It's important to note that automations that are turned off (inactive) still count against this limit of 50 automations.
• Additionally, you can only create up to 25 actions in one automation.

If you know how to write JavaScript code, you can potentially workaround these limitations by writing your own custom scripts.

However, if you don't you don’t know how to write Javascript code and you'd like a very easy way of having an unlimited amount of automations with absolutely no coding at all, I always recommend that people build their automations in Make's advanced automations & integrations, which offers an unlimited number of automations, an unlimited number of actions, an unlimited number of conditional branches, and an unlimited number of automation runs. This is the best way to workaround Airtable's automation limitations.

If you’ve never used Make before, I’ve assembled a bunch of Make training resources in this thread. For example, here is one of the ways that you could instantly trigger a Make automation from Airtable.

Hope this helps! If you’d like to hire the best Airtable consultant to help you with anything Airtable-related, please feel free to contact me through my website: Airtable consultant — ScottWorld

As Scott said, it is not possible to purchase more named automations.

Sometimes people are able to consolidate existing automations to free up an automation slot. This is often done by examining your triggers and seeing which triggers could be combined. However, when it isn't possible to free up an automation slot, you will need to turn to a third party automation tool.