If (and only if) this game is earning you back more than the initial 120 you put in during the sponsor phase then you’re good to do further experimentation and data collection.
Get a better Icon, then hire someone to make you 2 or 3 different ads (must be different styles, and all must be skyscraper since they perform better).
Have a free weekend someday, and put in 1k (either spread equally or for each ad depending on your budget) on ads, and 1k on sponsors. Keep an eye on the concurrents, and run some analytics over what gamepasses people are buying, and how long they are staying in game, how the retention is doing.
If you manage to earn back the rbx from the initial trial test, then you can continue to the third phase. If not, then cut your losses and make another game.
Third phase is you take a look at how much money you have, and how much you’re willing to lose and still be happy. (e.g. if you have 500k rbx total, but you’re only able to lose 50k and still be happy, then you use 50k. If you have 100k to lose, then use that). Never spend more rbx on ads than you are okay with losing. Ads and sponsors are pretty much a complete gamble and putting faith on lady luck.
This amount of money that you’re willing to lose is your ad campaign budget. Split it in half. The first half you will use in the first month since that is the most important. The second half you will use in the following months.
For the first month, split the percentage of clicks that you’ve obtained during the test phase where you put 1k on sponsors and ads. This percentage of how well each ad/ sponsor performed is the percentage share of the first month budget that you ought to spend. (You may want to multiply the sponsor share by a factor of x1.5 as they tend to give you players of the target audience, ie increasing player retention as they are more likely to stay in game/ come back for another play session)
Keep collecting data and analytics each time you run ads to not waste money. And run the second set of ads over the next few months if successful.
Beware of ads saturation which is a phenomenon that ads become less successful the more you run them, as more players out of the entire roblox daily users would have seen it. If your game is lacking replayability and/or has bad player retention, make another game and rinse and repeat with the budget you’ve generated off this one.