Not sure if this is in the topic zone but....when I was younger and working in the golf business, there would always be some some "unofficial" events that took place during the year. Some were stroke play events, some were two balls and even some scrambles. These were always with no handicap so the issue of sandbagging didn't enter the equation. You would throw down your $100.00, $50.00, or whatever and you played for the pot. I played in some events where the winning team/individual made in the thousands of dollars. Of course...this was all "off the books". A lot of gambling always took place in the area where I started in the golf business. I don't see much of that anymore (in my area). Used to be, there were always some type of $ games going on. Those were usually handicap events.
I think the ball doesn't know back spin from side spin. If spin is increased, then all kinds of spin are increased. For short irons, back spin is increased, so the ball flies straighter. For longer clubs, especially the driver, side spin will be increased more.