There are no real behind the Buddhas (re-)ligion, the "institution" of his monks, the Sangha. What ever other ways outside the Vinaya and tradition, one should know as corrupt in measures of Dhamma-Vinaya, not able to transport the Sublime Buddhas heritage, simply ways of livelihood and eager tries to make copies and deprive the world of the existence of his heritage.
The Buddhas "economy" is based on goodness with no interest to bind or increase and nurish debts to the world and not tending to leave home and stands.
Dhamma-Vinaya is nothing that can be studied in schools and out of books but requires proper cirumstances so that it is not hurtful at least.
Nothing to fear to get not really enough founded once having joined an upright Sangha and to life exclusively on generosity without objectives and impure motivations toward world but straight to liberation.
If not able to join the Sangha, the Ven. are usually open for serious questions any time. Also this, how ever, requires temporary leaving home and ones stand.
So you may be informed that such ways, either not knowing(aware) or deliberatly organised, are neither proper nor respectful but always "greedy" or "harmwishing" motivated. Be special careful if Monks join such improper undertakings.
There is only one "Buddhist organization" and this is the Sangha of the Buddhas good Bhikkhus. What ever organe else presented, one should know as "fake" and harmful for many.