Adaptation to the changing context of the non-profit sector

Reading Salamon's article on "the changing context of Non-profit leadership and management", I couldn't avoid thinking on one of Charles Darwin's maxim: "It is not the strongest nor the most intelligent that survives. It is the one that is the most adaptable to change".
The Non-profit sector had a 'honeymoon period' in terms of funding resources during the 60s; however, it has been subject to severe changes in their funding environment since the 80's (with some brief moments of relief in the 90s), hindering their operation capacity overall. Following the sense of Darwin's quote, it is imperative that nonprofit organizations adapt to this "new environment of scarce resources' and learn to function without lowering the quality and effectiveness of service or otherwise they will disappear.
These changes occurred in several aspects including (but not limited to) funding, competition and technology. Given this wide range of changes, nowadays non-profit organizations have (instinctively) implemented a number of measures to cope with them. For example, acquiring funds via services and products sale and implementing marketing strategies to secure customers.
While it is true that using for-profit practices may eventually threaten the fulfillment of non-profits' mission and generate legitimacy erosion, it is also true that it depends on non-profits' managers to show great skills to success in fulfilling their mission as much as to raise funds and keep the organization financially viable. Moreover, this responsibility extends to the board of directors (or trustees), who are expected also to provide leadership to preserve the health and life of the organization.
Personally I see the initiative of seeking funding through for-profit strategies as a good alternative to overcome problems associated to reduced government funding and revenue volatility (as a result of the instability of individual and corporate contributions)... I see it as a way to adapt to the changes that are occurring in the environment and that will probably continue for much longer.