I am trying to figure out if the Wolfram Language Sandbox (https://www.wolfram.com/resources/) is allowed to be used in a commercial setting.

An example of commercial use would be someone using the anonymous sandbox access (i.e. without logging in and subscribing to plan) to answer a question of a client as part of a work related project. The terms of use of Wolfram Cloud do not seem to be written with sandbox usage in mind. In fact, they state that

"You must have a Wolfram ID to use the Services.", (https://www.wolfram.com/legal/terms/wolfram-cloud/)

which is clearly not true when using the cloud via the sandbox.

It is not clear to me if the sandbox is allowed to be used in the above scenario. For comparison, WolframAlpha does not allow such a use:

"The free Wolfram|Alpha service is available for ad hoc, personal, non-commercial use only. [...] Systematic professional or commercial use of the website, or use for which you are being specifically paid, requires a commercial license." (https://www.wolframalpha.com/termsofuse/)