I sent support an email querying this because I too would love using the cloud processing on the Standard version. It would be a game changer for me (especially because the cost of hardware in my country is extremely expensive).
Their response was…
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Thank you for contacting.
Currently we can't provide you with exact information if this feature will be included to a Standard edition of PhotoScan. But probably we will include this option after testing period (currently cloud processing feature in testing stage) for Standard edition, and we will inform our users about any changes.
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Best regards,
Agisoft team.
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So hopefully we will see this amazing feature soon.