Profile boosting used to work--It would bring me DMs and job offers almost daily.
I lived off invites for almost 10 years, and then they stopped when Upwork became a casino. So I hate going into the Job Feed.
But then something suddenly changed and profile boosting no longer worked.
I wrote Support, and I kept getting different reasons for why profile boosting stopped working. One person admitted that they've changed how they're showing boosted profiles and now display them "outside of Upwork." And that was the exact day that I noticed the change. I thought that might be a privacy violation, so I checked the TOS, and they're allowed to do that.
But then the next Support person denied what the last person said, and instead sent me a word salad with BS about improving my profile views. Cut-and-pasted from the manual, no doubt.
Whatever they did, boosting profiles no longer brings in any ROI.
Of course, they had to mess with and ruin the last remaining tool that (sort of) works.