As per documentation in [1], it is possible to pass an Extra param:
"{select, {MatchPattern, DataPoint, Interval [, Retry [, Extra] ]}}"
Example:
"""
{select, {[{ {['_' | '_'],'_','_'}, [], ['$_']}],
          exometer_report_statsd,
          value,
          1000,
	  true,
          [{report_type, counter}]
	 }
}
"""

Without this patch, exometer_report.erl was failing with log warning
"Incorrect static subscriber spec".

[1] https://github.com/Feuerlabs/exometer_core/tree/master#configuring-static-subscriptions

exometer_report: Fix static subscriber spec with Extra param

Remove legacy macros, hut