You could calculate it more accurately, of course. But the relationship between earth's circumference and the distance to the moon is roughly 1:10, purely by coincidence, making it easy to calculate an estimate when scaling earth up or down.
I looked up the circumference of a football and it said about 70cm. As the moon is about 10 times the circumference of the earth away, that'd put the moon at 7m away.
Australia is wider than the moon. If earth had the size of a football (soccer), the moon would be about 7m away. If the sun had a diameter of 1m, Neptune would be 5.6km away. In that scale model, the next star would be placed in the outer planets. Space is insanely big.
Payments are very different. Any company is required to keep track of their finances, the tax authorities don't fuck around. If you electronically pay for something and expect anonymity, you are not very, um, educated. If you feel like you need their paid plans, pay cash and only ever access it through TOR running Tails. I feel like that's a reasonable level of opsec for most activists.
I need both a Luigi emoji and a guillotine emoji, for no apparent reasons.