Hmm, well Op you've reflected on a very important topic for perpetual futures contract traders, I never used to endorse perpetual futures contract trading for a particular set of reasons, To guide newbies, so they can be emotionally stronger with the spot market and religious factor as well. Still on the basis of my own knowledge, OP, funding rate harvesting is purely based on the Balancing Mechanism and funding Fee payouts.
As per your case in the Long position, the funding fee pouts were (Long pays to Short), as per your Unrealized PNL was 67$ before the funding fee payouts, and due to the volatile market and periodical adjustment (Fee payout), you've charged for the 60$ funding fees, but what you've noticed that traders are using funding rate to manipulate the market, in this case, I won't say they are manipulating the market they are doing the "funding rate arbitrage", most of the people don't really prefer this strategy as you also consider it's not trading (Gambling) particularly if we take a close look to the risk management.
In perpetual futures contract trading, traders never neglect risk management; however, for position traders focused on maximizing profit, the approach can sometimes lead to the elimination of risk management, thereby revealing motives driven by greed, reminiscent of gambling. Making money from the funding rate harvesting in the derivative market involves the 99% figured potential risk so, better avoid it (As I do
) and prefer a decent trading mode free of greed.