It is increasingly likely that over time, most if not all of these types of payments within apps will be using bitcoin. We are even seeing today that lightning network integration is obsoleting all these tokens and coins that are designed for these apps/networks.

Case in point: Brave browser, you can get BAT tokens for using it, viewing ads etc. However BAT is on eth, has high fees to transfer, and is stored in a kyc'ed custodial wallet. Slice uses lightning integration to do the same value proposition as Brave but for a cheaper asset to send, with more value and kyc free.

With signal, they will push their shitcoin now, but with no liquidity and a decreasing value overtime, they will have no choice but to switch to using lightning payments. This is and will be the way.