I work with a lot of promoters Worldwide & there are some ‘interesting’ characters out there with ‘unusual’ ethics & methods! They are in the minority however. Generally working with established promoters is relatively pain free as they know the score & are interested in repeat business.
New comers on the other hand are a major gamble, they often have very good intentions but get in too deep too early. (Alt-Fest anyone!!!) Still everyone has to start somewhere.
Get everything, (contractually), in writing & assume nothing