BMTC's BIAL services had a flat fare structure (Rs. 100 minimum on the BIAS Volvos), making it unviable for city commuters. I've often seen BIAS-7 (towards Koramangala) pass by empty while I waited on double road in the evenings. BMTC has changed the fare structure today, probably prompted by the 5 lakhs in losses they were accumulating every day on the airport schedules. I wonder why it took them so long to figure this out.
You now pay regular Volvo fares if you are using these buses within the city (up to Hebbal). The higher, flat fare structure only applies to airport commuters.
Here's a link to the BIAS routes: http://www.bmtcinfo.com/english/bial.html. I'm looking forward to using BIAS-7 from today.