About Gambling Google Ads ROI

i have read so many posts related Gambling Google Ads SEO.
the answer is always keep your keyword as white as possible.

for the expert and experienced master out there, how good is the ROI or success rate percentage?

Humanize said:

how good is the ROI

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ROI depends on the strategy behind the Google Ads accounts that are used (example : churn & burn threshold accounts / making payments) AND the ROI depends on the effectiveness of the campaign setup AND effectiveness of the landing page.
Hence, the ROI could be in the negative OR it could be quite good on the positive side.

Humanize said:

success rate percentage?

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Success rate percentage depends on the creativity of the person running such ads AND the strategies used for running such gambling) ads (example : cloaked campaigns or non-cloaked campaigns). So, the success rate percentage could be from 0% upto 80-90%.
Success rate obviously also depends on the effectiveness of the campaign setup AND effectiveness of the landing page.

Humanize said:

the answer is always keep your keyword as white as possible.

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That alone is not enough. What about the ad headlines, ad descriptions and the landing page ? All must be TOTALLY co-related with one another (keywords, ad headlines, ad descriptions and the landing page must be TOTALLY co-related with one another).

Humanize said:

how good is the ROI or success rate percentage?

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seems like i said it wrong, i mean "your ROI"
because i find it hard to hit your ROI especially using grey hat type of keyword, thats the concern.

thank for your reply