We installed a Siebel environment on a Linux VM (Linux version el6.x86_64, Read Hat 4.4.6-4, the VM has 64g ram). The database (Oracle 220.127.116.11.1) and Oracle Http Server (ofm_webtier_linux_18.104.22.168.0_32) were also installed in the same VM. We used HP loadrunner to do a performance testing, finding out the maximum concurrent user of Siebel Marketing OM. We've set the MT Server=1 and MaxTask=500. Every time the task of Marketing OM reaches 43, the OM just went "offline". No more task will be created. We check SWSE log, there were errors like "SBL-SMI-00216: Internal: Not an error, all the threads are busy". We don't know what was wrong with this. Does Siebel license limits the Max task of OM ? We used temporary Siebel license because the test was for a trial customer.
I don't think it's the license that is blocking, but technical resources.
You could try to set the MaxTask to 40 and the Max MT Server to something like 13.
But you have to check if your environment can handle 13 MT servers.
You can read more on Supportweb: How to Configure Siebel Object Manager (AOM / SOM) in Siebel 7.x and 8.x (Doc ID 476830.1)