Its not a marketing strategy. Its just a bug. They will fix it eventually.

I’ve been using protonmail since beta. It is my primary email address ever since. Honestly have never had any issues with it. I also use proton calendar as my main calendar. Which also works great. I’ve only used proton drive a handful of times but it worked just like it should every time. I used to use protonvpn but i switched to mullvad because its cheaper. When i did use it it was great too. Never any issues.