An extra journey for the 88

On Monday 4th January, service 88 between Goole, Airmyn, Rawcliffe and Rawcliffe Bridge gained a slightly enhanced timetable, with an extra journey in each direction. The 88 is operated by East Yorkshire and runs Monday to Friday. Departures from Goole North Street altered from 0905, 1205 and 1505 to 0905, 1105, 1305 and 1505, and from Rawcliffe Bridge changed from 0930, 1230 and 1530 to 0930, 1130, 1330 and 1530; the middle two terminating at Goole Interchange rather than North Street. The pdf timetable now refers to 'Some journeys are provided with the financial support of East Riding of Yorkshire Council' so I wonder if this could be a commercial enhancement as I'm sure the 88 has been fully subsidised ever since it was withdrawn from Thorne?