Original sentence: It is therfore difficult for those outside RC to assess these claims in any objective way.RC does not have a central membership roll and no overall membership figures are available; it is believed that somewhere between 50 and 100 thousand people have learned RC since its beginnings and there are probably around 10 to 15 thousand currently active RC practitioners, spread over about 40 countries.RC'ers claim that RC has attempted to systematize and analyze the counseling process more comprehensively and (to some) believably than other counseling disciplines; but this has been contested.There has equally been no well researched evidence of such harm presented; some newspaper pieces and academic papers and studies written by psychotherapists from other disciplines make such allegations.These should be regarded with caution as there is often profound disagreement between the various schools of psychotherapy or human growth as to methods, practices and effects of their perceived rival's activities
Edited sentence: At the same time the fact remains that RC has refused to take its place as a mainstream organisation subject to external systems of accountability.It is therefore difficult for those outside RC to assess these claims in any objective way.It remains a maverick organisation, subject only to its own internal guidelines.RC does not have a central membership roll and no overall membership figures are available; the RC organisation claims that somewhere between 50 and 100 thousand people have learned RC since its beginnings and that there are probably around 10 to 15 thousand currently active RC practitioners, spread over about 40 countries.RC'ers claim that RC has attempted to systematize and analyze the counseling process more comprehensively and (to some) believably than other counseling disciplines; but its detractors maintain that the theory is a hodge-podge of borrowed idealogies, linked by a collection of irrational premises (ie "all people are born good").Some argue that these should be regarded with caution as there is often profound disagreement between the various schools of psychotherapy or human growth as to methods, practices and effects of their perceived rival's activities.There has equally been no well researched evidence of such harm presented; even though several  newspaper pieces, academic papers and studies written by psychotherapists from other disciplines have made such allegations.There is no empirical evidence to support any of these figures and the actual membership numbers are probably much less, based on the fact that many people start or even complete the fundamentals course, but few continue to pursue membership in the organisation