It's easier to recruit people for some programs than for others. On examining the dynamics of a program, you can often make a reasonably accurate evaluation of the probability that a program will or won't work. For some programs it's best to join them at the outset. For others it's better to wait for six months or a year, until credibility has been established and the kinks worked out, before joining. It's prudent to operate on the basis that programs have a limited life.
Some programs improve over time up to a point after which they start declining.
The ideal is to earn the maximum with minimum risk. The ideal is to earn the maximum with minimum time spent. With some programs a great deal of time can be spent on administrative hassles. With some programs it may require a lot of time to recruit people and deal with their questions and problems. Above we have reports from two people of their experiences.