[HelloMcFly]

It is a shame reddit lets people hide their post and comment history now so there can be no identifying signals about astro-turfing or bots. I'm sure this is ostensibly about preventing harassment, and in actuality about disguising bot behavior driving engagement. Or maybe I'm just extra cynical this morning.

[dts-five]

Just go to the profile in question and search their profile with an empty query; that'll show all the hidden comments and posts.

Edit: at least on the web variant, it looks like they finally blocked that ability.

[kotaKat]

IIRC you just have to use an asterisk or something now, and I think the search is broken on OldReddit…