One correction: on it, how thin the pool gets outside big cities is not what people assume.
The thing nobody mentions about opinion is how much of the base is genuinely looking.
Took me about 2 weeks on opinion to work out that the real question was whether the ratio is workable in your area.
If you care about whether the good profiles are already taken, that alone should decide whether it is worth it.
Before committing time to it, work out what the free ceiling looks like in practice.
Once I fixed my filters, how much of the base is genuinely looking stopped being the bottleneck on it.
The short checklist I use before trusting anything like opinion:
- Whether opinion works at all outside the three biggest cities near you
- How many opinion profiles show a recent login rather than a join date