No, you will not be able to combine both sub-users accounts for Transactional and Marketing.
This is due to how Sendgrid is set up, where any Transactional email data will be sent to the Transactional sub-user account and any Marketing email data will only be sent to the Marketing sub-user account.
In an effort to supply information as quickly as possible, this article has been published prior to a formal technical review, and is subject to factual, grammatical, and various structural errors. Data may be incomplete, misordered, or incorrect.
This additional disclaimer will be removed upon formal review of this article. The standard Punchh Inc. KB Disclaimer still applies, and can be found at: https://support.punchh.com/hc/en-us/articles/360040100273-Punchh-Inc-Knowledge-Base-Disclaimer
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)