I decided to use phone number verification for signups on my 20-things.com link aggregator. I was thinking of dropping it altogether, but after reading what ind

I decided to use phone number verification for signups on my 20-things.com link aggregator. I was thinking of dropping it altogether, but after reading what indiehackers just did, I will probably keep the phone number verification and add apple signups as a complementary channel. What is else left for us to do in this day and age to minimise spam and abuse?