Although I think it still depends on what Apple means by "associated at any point in time with receiving digital content or services". I think they may be intending to allow something like GoFundMe or Venmo, while disallowing something like Reddit gold where users give gifts based on the digital content created even though that content isn't gated by payment.

Perhaps the developer's use of Bitcoin complicates things as well. Does Apple consider that a "monetary gift" or "digital content" or both?