Step 1 : open a Swisscard account with a referral code
Step 2 : cancel the account within 2 weeks
Step 3 : provide IBAN when asked
Step 4 : receive 40 CHF cash
Step 5 : go to step 1
Step 4 came as a surprise to me. Step 2 actually costs the price of a (registered) letter so even if you ignore cost of labour, you don’t quite get 40 CHF net per iteration. I have not actually tried step 5 : it probably does not work. If it does work it definitely does not work infinitely. Yes, it’s stupid and I am not actually recommending to do this intentionally.