No credit card dating websites
There are many very nice, honest, intelligent and successful people out there who could make very good partners with you however may not be as photogenic, poetic or quite frankly as attractive as you would like them to be.
If they are locals it is easy to establish their credentials this will minimize the risk of being scammed because believe me they are out there.
Now that’s not to say oasis active membership is of a lower standard than match or other sites but with any free service you are going to have to contend with a higher level of scammers.
Generally people not paying for a service are not going to take it as serious.
In terms of the ads on oasis active I did find them somewhat distracting with banner ads on every page and some quite strategically placed below search results so they were quite easily confused with actual results.
That said it is free and someone has to pay the piper.