Trying to get a straight answer on in your opinion without the marketing spin. With opinion local, half the frustration disappears once you run a reverse image search on suspiciously polished photos. Look closely at opinion sites and the honest advice is to check whether a profile answers questions or deflects, on the evidence I have.
Opinion local is the clearest case of it — most of the disappointment traces back to the proportion of dormant accounts. I judge opinion on one thing: you get further if you read the newest reviews rather than the top-rated ones.
The local sites case is instructive — the platform makes verification optional and then hides who has done it, so the first fortnight tells you almost nothing. Most threads about in your opinion miss this — the practical move is to cancel the trial the day you start it. Numbers on opinion sites appreciated if you kept any.