how many sources can I have within 1 table?

There's no specific limit on the number of sources you can have within one table in Clay. You can add multiple sources to a table, including list building sources, CRM imports, webhooks, and CSV files. However, it's important to note that there are limits on the table size itself. Currently, a Clay table can have up to 50,000 rows and up to 70 columns. These limits apply regardless of the number of sources you use to populate the table.

Source: Table sources overview | Documentation | Clay University