(invite surveys) usually provide the highest-paying surveys, their reward/time ratio is usually good.
The downside is that qualifying for their surveys is not easy but I still like these two routers.
I also like GlobalTestMarket
($1.33 daily router), pretty good reward/time ratio, usually provides interesting surveys and their profile targets are usually not too selective, qualifying for their surveys is pretty easy.
I basically never get OpinionWorld
surveys nowadays but I used to like them when they were offered through the $0.85 router and they could be completed up to 5 times a day (now they're invite-only surveys).
(invite surveys) are not as rare as OpinionWorld but I think it's harder to qualify for them, I often get immediately disqualified as soon as I open them.
It's worth mentioning that Toluna and OpinionSurveys
($0.75 daily router) provide the same surveys sometimes, since Toluna owns OS.
($1 daily router) rarely provides surveys but I often get lower-paying, invite-only surveys by this router.
I think the reward/time ratio for CINT's invite-only surveys could be better; their surveys often bore me with redundant questions
Their reversal rate could also be lower imo
I'm conflicted about YourSurveys
(invite only). YS often provides surveys that were originally presented by other routers so YS ends up providing lots
of surveys...the downside is that they provide them at a much lower
pay rate than the original router; original pay rate ends up being almost halved (halved
!) by YS.
Whenever I receive an invite by YS, I usually wait a couple of minutes to see if I receive the same survey by higher-paying router (Sample Cube and Samplicio.us especially).
I rarely bother with Speak up!
($0.47 daily router) so I can't comment on it.
I usually avoid TapResearch
(daily router) because it often works like YS does, providing surveys by other routers but at a lower pay rate. Giving members $0.01 for non-qualifying surveys is a small but positive thing TR does, I'll give them that.
(external offerwall) sometimes work like YS does - providing surveys by other routers but at a lower pay rate - but is also sometimes present original surveys that cannot be found elsewhere. Some of these surveys are extremely short and easy, I think trying PL's surveys is worth it.
Done, these are all my observations about surveys and routers
Please keep in mind that these are my personal opinions and observations. We all have different profiles and live in different locations so we most likely have different experiences completing surveys.