What would you do with spare cash that comes in very irregular amounts (from doing surveys etc.)?

Great minds think alike! I DCA $50 into my REITS portfolio in Syfe every month.

for even more random earnings, like from SoCash cashbacks and Google Pay cashback, I transfer them into my SRS account, despite the hassle. Yes, you can make a top-up of $1 to your SRS!​​​

For me, I usually put the money in a seperate high yield savings account (SCB Jumpstart, Singlife), where I know I won't spend the money. Until I want to invest, that's when I take it out, combined with savings from other avenues to invest.

Yougov gives cash in paypal, so it's just in my paypal account now. I don't know when I'm going to use it but it's good for me since I don't really want to spend it.