Usually you get very little donations if any at all but then again you run across 1-2 nice people who donate 10m+ (one guy gave me 8k baby dbones too). Its all too sporadic and not worth the effort in my opinion. Id rather do something that didnt depend on the gratitude of other people, the number of nice people seems to be diminishing and towards the end of my hosting an open house i got very little donations and i quit altogether id rather be botting or something .
TL;DR it can be great money if you run across appreciative people, or completely shit money with a bunch of ungrateful pricks, this is runescape guess what there is more of .