At this point I don’t trust any company that offers a core free tool with an upsell. Trials or limited access is one thing, but a free forever product that needs active maintaining, be skeptical.

It’s been tough for us at https://pico.sh trying to figure out the right balance between free and paid and our north star is: how much does it cost us to maintain and support? If the answer scales with the number of users we have then we charge for it. We also have a litmus test for abuse: can someone abuse the service? We are putting it behind a paywall.