How many copies did Microtransaction Simulator sell?

An estimated 29k to 47k copies, based on its 843 Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did Microtransaction Simulator make?

Microtransaction Simulator is free to play, so there is no copy-sales revenue to estimate.

How big is Microtransaction Simulator?

Estimated owners: ≈ 29k–47k; from 843 reviews (Very Positive)

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

Does this actually work?

We left Microtransaction Simulator out and predicted the genre from its 8 similar games. Every figure here, including Microtransaction Simulator's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 10.4M–24.6M

best case 123.2M (PUBG: BATTLEGROUNDS)

The Multiplayer lane

A big, proven genre: most sell around 11.9M copies.

A typical game

≈ 11.9M copies

≈ $91.4M after Steam's cut

from ~248k reviews

Best case

≈ 123.2M copies

PUBG: BATTLEGROUNDS

from 2.7M reviews

Copies and revenue are rough lifetime estimates from the review count; typical figures are medians per column, so they can come from different games.

The lane you'd be entering

Winners here lead with Survival + Shooter, priced around $25.
None of the games you compared shipped in the last two years; the newest is from 2018. That says more about your picks than about the market, so add newer similar games to read the timing.
A typical game here lands in Diamond ($1M+ before Steam's cut, est.). Tiers: Chris Zukowski's benchmark tiers.

Similar games

Game	Price	Reviews	Tags	Est. copies	Est. revenue
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 93.9M–152.6M 11x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter +6
Wallpaper Engine 2018	Est. copies ≈ 30.4M–49.4M 4.0x vs typical SteamSpy 20M–50M	Est. revenue $41.7M–$112.1M net $75.8M–$172.5M gross	$4.99	1000k reviews Overwhelmingly Positive	MatureUtilities +6
VRChat 2017	Est. copies ≈ 9.1M–14.8M SteamSpy 20M–50M	Est. revenue Free	Free	265k reviews Mostly Positive	VRFree to Play +6
Stellaris 2016	Est. copies ≈ 7.8M–12.7M SteamSpy 2M–5M	Est. revenue $107.6M–$289.3M net $195.7M–$445.1M gross	$49.99	196k reviews Very Positive	SpaceGrand Strategy +6
House Flipper 2018	Est. copies ≈ 3.4M–5.5M SteamSpy 2M–5M	Est. revenue $23.1M–$62.0M net $42.0M–$95.5M gross	$24.99	110k reviews Very Positive	SimulationDesign & Illustration +6
Human Fall Flat 2016	Est. copies ≈ 9.0M–14.6M SteamSpy 10M–20M	Est. revenue $49.5M–$133.2M net $90.1M–$204.9M gross	$19.99	225k reviews Very Positive	Co-opFunny +6
Hearts of Iron IV 2016	Est. copies ≈ 14.8M–24.1M SteamSpy 5M–10M	Est. revenue $204.0M–$548.6M net $371.0M–$844.0M gross	$49.99	371k reviews Very Positive	StrategyWorld War II +6
SCP: Secret Laboratory 2017	Est. copies ≈ 8.0M–13.0M SteamSpy 5M–10M	Est. revenue Free	Free	232k reviews Very Positive	Free to PlayMultiplayer +6