Yes, as of the 21st of February there is an additional $100 fee so the total is $255 for the open work permit with the pilot program.
New fee for open work permit applicants
A fee of $100 will be collected, also starting February 21, 2015, from open work permit applicants. This fee will be paid at the same time as the work permit processing fee and can be paid online. The fees collected will offset the cost of new initiatives to improve data collection on the role of open work permit holders in the Canadian labour market, as well as increased promotional activities to encourage open work permit holders to apply for permanent residence.
International Mobility Program streams that feature open work permits rather than employer-specific work permits include the working holiday portion of International Experience Canada, the Post-Graduation Work Permit Program, spouses/common-law partners of highly-skilled foreign workers and international students, and certain foreign nationals who are already in Canada waiting for the finalization of their applications for permanent residence.
Source:
http://www.cic.gc.ca/english/department/media/notices/2015-02-09.asp