Query to collect min,max and currently running number of engines is below.:
@servernmae as "ServerName"
,(select value from master..sysconfigures where name="number of engines at startup') as "AtStartup"
,(select value from master..sysconfigures where name='max online engines') as MaxAllowed
,(select count(1) from master..sysengines) as "Running"
Currently provided licensing model collects only "Max online enines" does not do justice to the engines actually deployed