Churches are paying BING to target their ads at me.
More likely trying to grab Christians from smaller churches!
Churches spend massive amounts of money of recruiting new members,
Mega churches, yep. Not the smaller ones. I think your data is coming from US sources? The first link (How much should your church spend on marketing), under point number 2 a study by the Center for Church Communication, and I looked them up, a US company, but I think not active now. The AI blurb about them says: "It is best known for running Church Marketing Sucks, an online platform providing practical advice, creative ideas, and discussions for church communicators" That name made me chuckle a bit. However I found: "We’re taking a break to go away and dream it all up again" (in 2019), and the CFCC don't look active either, so that study will be at least 5 years out of date if not more.
https://churchmarketingsucks.com/
Doesn't mean other companies don't exist of course.
The small UK churches I know about really struggle to get enough funds to keep going. So if anyone has a Church and they want to increase their revenue, then no problem I think this doesn't apply in the UK, because there are definitely problems.
In terms of needing funds, you realise churches are very expensive to maintain - the buildings, that is, unless you use a hall or something instead. They cost a fortune to heat and repair. It's a shame some of our (UK) historic churches are falling into disrepair because of this.
It is big business. $1.2 trillion in the USA.
Yes, in the US, but Christianity is worldwide and it's not 'big business' everywhere. The US is a wealthy country, they can pour insane amounts of money into whatever takes their fancy. Probably best not to base your opinions on Christianity solely on what goes on in the US.
Did Jesus not say to sell all and give to the poor ? Yes He did. Of course He also meant looking after those in one's own congregation, but that wouldn't have extended to private jets!