Regarding your questions concerning the spirit souls falling into Maya's influence, it is not that those who have developed a passive relationship with Krsna are more likely to fall into nescient activities. Usually anyone who has developed his relationship with Krsna does not fall down in any circumstance, but because the independence is always there, the soul may fall down from any position or any relationship by misusing his independence. But his relationship with Krsna is never lost, simply it is forgotten by the influence of Maya, so it may be regained or revived by the process of hearing the Holy Name of Krsna and then the devotee engages himself in the service of the Lord which is his original or constitutional position. The relationship of the living entity with Krsna is eternal as both Krsna and the living entity are eternal; the process is one of revival only, nothing new.
Astanga Yoga is better than Karma Yoga and Jnana Yoga is on the level of Astanga Yoga. But the Bhakti Yoga is the ultimate goal of all Yogas. In other words, Karma Yoga, Jnana Yoga, and Astanga Yoga by proper execution culminate in Bhakti Yoga. So far yogis who meditate on the Paramatma form of the Lord within their hearts, if they see Him in that way actually they become pure devotees, but if they do not perfect the process they may remain on the lower level of incomplete realization or Paramatma realization.
I am happy to learn that your Sankirtana party is very successful. If you have some extra money, you can contribute to the book fund because I am contributing to purchase a large church here to the extent of 20,000 dollars; and try to send the maintenance charges to me regularly.