How about a birthday cake next to your name in game, instead of the orange thumb, but it stay next to your name for the whole day, so that people can easily give you a ride on.
And to make it more interesting instead of a blue thumb you get a birthday cake when somone give you a RIDE ON.
A good point you make. For stuff like Zwift I don’t use my actual DoB. I only share the real one with important bodies like our medical service, tax etc. Years ago I had my ID hacked but luckily the DoB they got was wrong so I was contacted by a loan company checking and was able to alert my bank CCC etc. I would encourage others to do the same.
Of course, broadcasting birthday fun would be an opt-in feature.
Can’t see any issue with double XP or Drops though. OK, there might be a small possibility that someone screenshots themselves getting 40XP on the km, but distributing that is their choice.